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The Best Backpacking Sleeping Bags of 2023

(Photo/Eric Phillips)
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A good night’s rest is essential to getting the most out of your backcountry experience. We’ve found the best backpacking sleeping bags for every environment and budget.

A good sleeping bag is one of the most important investments an avid outdoors person will make. To evaluate the best backpacking sleeping bags, we took key performance factors into account, including warmth, packed size and weight, materials, extra features, and value.

Our Buyer’s Guide at the end of this article details the performance features we suggest considering when narrowing down a choice. Also, be sure to check out the backpacking tent review to make sure you get the best gear for your needs.

Here, we break down the best sleeping bags for backpacking, which means a focus on weight and compression size. If you’re looking for more all-around comfort-oriented sleeping bags, check out our roundup of the best sleeping bags for camping .

Every bag on this list is among the best backpacking sleeping bags on the market right now, so be sure to read through the features and click through to find the best bag for you.

Scroll through to see all of our recommended buys or jump to the category you’re looking for. At the end of our list, be sure to check out our handy comparison chart and comprehensive buyer’s guide .

The Best Backpacking Sleeping Bags of 2023

Best Overall Backpacking Sleeping Bag: Mountain Hardwear Phantom 15

Mountain Hardwear Phantom 15

The best overall backpacking bag this season is the Mountain Hardwear Phantom 15 ($550). Our testers agreed that this 15-degree rated bag provides the versatility for almost any adventure. Its lower limit of testing is 11 degrees, making it suitable for everything from high-altitude mountain adventures to remote desert trips well into the fall when temperatures dip below freezing.

The large foot box and 58 inches of shoulder girth allow for comfortable sleeping, with enough room to stuff a hot Nalgene at your feet to keep your toes warm. We found the 20-denier nylon fabric is tougher than most bags in its class. On cold nights, six inches of 850-fill down and large baffles keep the draft and cold air out.

We really liked that the neck baffle encircles the entire circumference of the bag, offering protection to keep your body heat sealed in. This bag is offered in short, regular, long, and left or right zip. It also comes with its own compression sack.

Unfortunately, all of this bag’s warmth comes at a high price. The biggest complaint we have is that this bag is not in the budget for many shoppers. We really don’t have much to complain about with this product, but we will continue to use and abuse and critique it.

Overall, the Phantom is a must for any serious backpacker looking for a lightweight adventure bag that doesn’t skimp on warmth or quality.

  • Buy This Bag If: You want a lightweight, lofty bed for the backcountry
  • Packed Volume/Weight: 6 liters/2 pounds 4 ounces
  • Insulation: 850-fill down
  • Temperature Ratings Offered (Fahrenheit): 15
  • High Loft
  • 850 Fill Down
  • Circumferential neck baffle
  • Compression Sack Included
  • Expensive

Check Price at REI Check Price at Amazon

Best Budget Backpacking Sleeping Bag: Kelty Cosmic 20

Kelty Cosmic 20

Kelty still knows how to make a good sleeping bag at a fair price, and the Cosmic 20 ($170) is no exception. The dual zipper sliders are convenient for adding ventilation to the lower part of the bag, and we love that this bag is affordable while still providing adequate warmth.

Last year, Kelty reduced the loft of the down used in this bag to a rating of 550. That has helped keep the price down, but it also reduces packability, raising it to 10 liters.

The key features and feel of the updated Kelty Cosmic 20 keep it on our best-of list again — and we expect that will be the case for a while to come. This is a great purchase for those looking for an affordable down sleeping bag that’s applicable for moderate to cold temperatures in the backcountry.

For the price, we think it’s the best backpacking sleeping bag on the market.

  • Buy This Bag If: You’re on a budget but want a bag that can hang with the best
  • Packed Volume/weight: 10 liters/2 lbs. 10 oz.
  • Insulation: 550-fill down
  • Temperature Ratings Offered (Fahrenheit): 0, 20, 40
  • Very affordable
  • Dual sliders on the zipper for ventilation
  • 550-fill down limits compression size
  • Less stylish

Check Price at REI Check Price at evo

Best Value Backpacking Sleeping Bag: Mountain Hardwear Bishop Pass

Mountain Hardwear Bishop Pass

The Mountain Hardwear Bishop Pass 15 ($275) earns its place on the podium as our best value thanks to its versatility and wallet-friendly price tag. This bag provides ample insulation, decent packed size and weight, and sturdy materials at a very reasonable price.

Its 650 fill-down lofts to five and a half inches and is protected by a DWR (durable water repellent) ripstop nylon shell. The 20-denier shell holds up well to abuse, and the 30-denier liner is soft against the skin. At two and a quarter pounds, this bag is an average weight for its class.

We also loved that it can be zipped together with other Mountain Hardwear bags with the opposite side zipper for a larger shared bed for two. While this bag might not be the warmest or lightest in the line-up, it proves to be more durable than some of its thin-skinned competitors. The materials are a bit sturdier, which does keep this bag above two pounds.

One minor complaint is that we prefer a bigger, circumferential draft tube at the neck, but the collar baffle does a decent job keeping the cold air out. Also, it doesn’t pack as small as other bags with higher goose down fill power.

If you’re on a budget and looking for a bag that performs well, the Bishop Pass checks all the boxes without compromising too much in the way of quality. It’s a great choice for folks who want the warmth and packability of a down sleeping bag without the high price tag of top-tier models.

  • Buy This Bag If: You want your cake and to eat it too
  • Packed Volume/Weight: 8 liters/2 pounds 5 ounces
  • Insulation: 650 fill down
  • Temperature Ratings Offered (Fahrenheit): 0, 15, 30
  • Rip-Stop fabric
  • Plush liner
  • Ergonomic foot compartment
  • Can zip together with other MH bags
  • Less packable than other options
  • Small neck baffle
  • Heavier than bags with higher fill power

Check Price at REI Check Price at evo

Best Ultralight Sleeping Bag: Rab Mythic Ultra ( 20-Degree & 32-Degree )

Rab Mythic Ultra (20-Degree & 32-Degree)

Perhaps one of the lightest sleeping bags money can buy, Rab’s Mythic Ultra ($650-670) lineup is all about shaving grams.

When we first saw this bag at Outdoor Retailer , we knew it would advance tech in the sleeping bag market. Leveraging what the brand calls its Thermo Ionic Lining Technology (TILT) , the Mythic Ultra boasts an incredible warmth-to-weight ratio.

It achieves this in three ways; first, Rab utilizes a unique trapezoidal baffle construction it claims prevents down migration and promotes more loft. Second, and more importantly, Rab coats thin fibers within the bag with titanium. This helps reflect radiant body heat back toward the sleeper, keeping the inside of the bag warmer without adding more down. Lastly, it uses 950-fill down, one of the best warmth-to-weight insulators you can get in a sleeping bag.

Available in a 180 (32 degree) and 360 (20 degree) model, you can customize depending on the weather extremes you want to be prepared for.

While this bag is on the upper end of the price range, the construction and materials justify the cost. Our only complaint in testing was that it is very tight to get in and out of. This is par for the course for a lightweight mummy bag, but worth considering if you are larger or prefer side sleeping.

Staying light on all features, there’s just a single one-eighth-length zipper. Overall, it proved the lightest and most packable option we tested. For the ultralight enthusiast, this might be the best backpacking sleeping bag available right now.

  • Buy This Bag If: Every single gram counts
  • Packed Volume/Weight: 5 liters/14.1 oz. (180/32-degree)
  • Insulation: 950-fill down
  • Temperature Ratings Offered (Fahrenheit): 180 (32 degree)  360 (20 degree)
  • Insanely packable
  • Very warm
  • Lightweight
  • Tight to get in and out of
  • Expensive

Check 20° Price at Backcountry Check 32° Price at Backcountry

Best Overall Women’s Backpacking Sleeping Bag: Big Agnes Torchlight UL ( 20-Degree & 30-Degree )

Big Agnes Torchlight UL

The Big Agnes Torchlight UL ($350-420) made it to the top of our women’s options for the second year in a row. This bag is as close as it gets to a custom setup made just for you thanks to the non-catching zippers on each side.

The user can custom fit the bag depending on the style of sleeping with a 10-inch zippered side panel along the length of the bag. Slide the zipper and the bag expands for side sleepers or those that just want a little more room. It’s plenty light enough to carry for a long hike or ride (2 pounds 4 ounces for regular size), and our testers found it luxurious enough for car camping trips.

The interior loops allow for a bag liner and the interior mesh pockets hold gadgets and other small things to keep close (and warm) at night. On top of all that, it’s filled with water-repellent DownTek down, keeping you warm and cozy across a wide range of temps.

The drawback to these extra elements is that this bag is heavier than many others tested. Worse still, it doesn’t pack down nearly as small as we would prefer. For the right person, though, that won’t matter and is an easy trade for all the extra room gained from the side panels.

This bag is perfect for those who place comfort above all. It can both expand and cinch around your body. Yet with all these features, it still packs down easily and is small enough to take out in the wilderness.

  • Buy This Bag If: You like being tucked in tight some nights and having extra room during others
  • Packed Volume/Weight: 14 L/2 lbs. 5 oz. (20-degree)
  • Insulation: 850-fill down
  • Temperature Ratings Offered (Fahrenheit): 20, 30
  • Highly adjustable with expandable side panels
  • Accessory pockets
  • DownTek waterproof down
  • Heavy
  • Bulky

Check 20° Price at evo Check 30° Price at Amazon

This Expandable Sleeping Bag Gives Adventurers a Custom Fit

New from Big Agnes, the expandable Torchlight line of sleeping bags has a unique fit system in a lightweight, efficient mummy. Read more…

Best for Thru-Hiking: Enlightened Equipment Enigma

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10 years ago, many backpackers would have scoffed at anything named a “quilt” worming its way into an article on the best backpacking sleeping bags. But things have radically changed. Leading the ultralight pack is the Enigma ($340), Enlightened Equipment’s lightest, most minimal quilt, and one of the most popular backpacking quilts on the market today.

Merging the quilt template of their wildly popular Revelation with a completely sewn-closed footbox, the Enigma is designed for the dedicated, weight-conscious backpacker wanting the most dialed, no-frills ultralight setup.

Other models from Enlightened Equipment, like the Revelation, offer the option of laying the quilt open like a blanket, or cinching the adjustable ¼ length zipper footbox closed with a pull cord at the feet.

While this was practical for those wanting the functionality of a blanket with a sleeping bag feel, it added weight and allowed some warmth to escape at the feet. The Enigma eliminated this, shaving off some ounces, and trapping precious heat.

The Enigma offers stellar warmth and packability at a super low weight; (photo/Honey McNaughton)

Having taken both the Revelation and Enigma on extended thru-hikes, we feel like the Enigma does a better job of reducing drafts, packs into your bag easier, and is just a better quilt for backpacking in general.

Enlightened Equipment is known for the high level of customization it offers for its quilts, allowing the weight, warmth, size, durability, and style to be perfectly dialed for whatever adventure lies ahead. Check out the fully custom Enigma to find your perfect style. Just beware, these have some long lead times.

You can also choose between 7D, 10D, or 20D fabrics for the outside, and 7D and 10D for the inside to adjust the durability of the quilt. We found that a 10D outside and 7D inside held up just fine over months of abuse. The baffles are thoughtfully designed into a continuous U shape which reduces feather shifting, and the stitching between the baffles doesn’t go all the way through the quilt, eliminating cold spots.

The quilt also comes with an elastic strap attachment system for securing it to sleeping pads, and a cinch cord at the neck to further eliminate drafts. We wish they had put the pull cord on the side of the quilt, however, as opposed to right in the middle above your face, as it often gets annoying while trying to sleep…really one of our only complaints.

In short, the Enigma is a reliable, ultralight, and super warm alternative to traditional sleeping bags while backpacking. For long thru-hikes spanning months, or fast and light forays in the mountains, this thing will keep you toasty without weighing you down.

  • Buy This Bag If: You are looking for one of the best warmth-to-weight quilts on the market for thru-hiking or ultralight trips in the backcountry
  • Weight: 17.9 oz (850 fill, 30-degree, regular/regular, 10D fabric inside and out)
  • Insulation: 850 or 950 fill down
  • Temperature Rating Offered (Fahrenheit): 50, 40, 30, 20, 10, 0
  • High level of customization
  • Superior warmth-to-weight ratio
  • Does a great job of reducing drafts and cold spots for a quilt
  • Pretty long lead times on custom orders (2-4 weeks, sometimes up to 6)
  • Pull cord at neck often gets annoying

Check Price at Enlightened Equipment

Best for Side Sleepers: Big Agnes Sidewinder SL (20-Degree)

Big Agnes Sidewinder SL (20-Degree)

Big Agnes built the Sidewinder SL ($300) to move with you as you toss from one side to the other and accommodate the snags that befall side sleepers in traditional bags.

For its 20th birthday, this standout brand earns a “Best Of” from us. The Sidewinder series has ambidextrous zippers and wiggle room built in for those whose camp nights usually end up in a twisted sleeping bag mess. This includes a zipper that won’t fold under when you move, as well as a foot box shaped to fit the way feet lie when sideways.

It also features a custom mesh pillow pocket to help keep your pillow in place and give you room to fold your hands underneath while on your side. Features like the foot box and zipper worked well when we slept in the Sidewinder SL.

Unfortunately, when packed, this is one of the bulkier bags that we tested. The cost of comfort is extra material, a fair tradeoff for a good night’s sleep.

This bag is definitely a gem for side sleepers. If that’s you, the Big Agnes Sidewinder SL is worth checking out.

  • Buy This Bag If: You’re a side sleeper
  • Packed Volume/Weight: 14 L/2 lbs. 4 oz.
  • Insulation: Hybrid (650-fill + synthetic in hips and feet)
  • Temperature Ratings Offered (Fahrenheit): 20, 35
  • Pillow garage
  • Zipper great for side sleeping
  • Ergonomic foot compartment
  • Less packable than other options

Check Men’s Price at REI Check Women’s Price at REI

Best of the Rest

The market for lightweight, pack-friendly sleeping bags is huge. There are tons of well-made, comfortable, high-quality bags.

Don’t see what you like above? All of the bags below made the grade during our testing and might be perfect for your needs as well.

Feathered Friends Hummingbird UL 20/30

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Optimized for fast and light missions with chilly temps in the forecast, the Hummingbird UL ($509-589) sleeping bag is designed to maximize warmth while maintaining a low, lightweight profile. With Pertex Endurance fabric and 950+ fill power down, it boasts the slimmest design and lightest weight in Feathered Freinds’ lineup. The Hummingbird has replaced the popular Merlin 30 UL, so if you’re after that model then look no further.

We found the design of this bag to be thoughtfully made. It eliminated some issues we’ve had with sleeping bags in the past. One of the first things that struck us was the locking sliders on the two-way zipper. This pretty much completely eliminates the annoyance of the zipper snagging on overlapping fabric and getting stuck. A constant frustration we have with traditional bags.

Feathered Friends Hummingbird UL
The Hummingbird UL cuts weight with a slim, simple design; (photo/Honey McNaughton)

We tested the 20-degree model in similar temps, and found that to be an appropriate rating, keeping us toasty at 20 or a little below. The voluminous draft collar prevents cold air from slipping through the zippers, and we loved cowboy camping in windy conditions with it. The continuous baffles allow you to shuffle the insulation around easily, minimizing cold spots.

At 1 pound 8 ounces for the 20-degree, this is one of the lighter three-season mummy bags out there. The superior warmth and wind resistance match that of heavier models, but the minimal weight is achieved by a pretty slim, simple design, which we found does cut down on overall comfort. This wasn’t too much of an issue for us, as we actually like the close-cut feel of a down coffin, but some may want more room to stretch out or splay their legs.

As a true 3-season lightweight sleeping bag, the Hummingbird UL stands out as one of the best backpacking sleeping bag choices for those looking to go the distance with as light a base weight as possible.

  • Buy This Bag If: You need one of the lightest, 3-season mummy bags on the market for fast and light missions
  • Packed Volume/Weight: 9L / 1 lb. 8 oz. (20-degree, regular length)
  • Insulation: 950+ fill goose down
  • Temperature Rating Offered (Fahrenheit): 30 or 20
  • Lightweight
  • Super warm
  • Thoughtful design
  • Snug, somewhat uncomfortable fit
  • Simple design

Check Price at Feathered Friends

Montbell Seamless Down Hugger WR 900 #3

Montbell Down Hugger 900 #3 sleeping bag

When it comes to durability, packability, and overall comfort, Montbell takes the cake. The Down Hugger ($479) line as a whole presents a finely tuned array of bags tailored to various temperature ratings, fill powers, and feature sets.

As an update to the previous model, Montbell managed to shave a few more ounces and fractions of a liter off the weight and pack size. Thankfully, the Japanese backcountry brand kept all the goodies that made the Down Hugger line a true standout. Montbell’s seamless design helps promote more loft space for the down within the bag.

Rather than utilizing the traditional baffle, the company has what it calls “spider yarn,” throughout the bag that holds the down in place in a web-style construction. You get a highly packable bag with an exceptional warmth-to-weight ratio.

In our testing, that’s exactly what Montbell achieved. Not only is the Down Hugger plush and warm, but it also provides a surprising amount of shoulder room. The GORE-TEX INFINIUM shell blocks drafts and wind. It also helps repel moisture like the condensation that often accumulates inside tents. It uses incredibly high-quality 900-fill down, which certainly adds to the high price.

The high price is a big drawback. The unique design and high-quality construction warrant the price tag but mostly for serious enthusiasts. Another complaint is that the Down Hugger does not have many venting options, but it is offered in temperature ratings ranging from 15 to 40 degrees Fahrenheit.

This bag is perfect for the serious hiker who wants a bag that packs as small as can be, yet still offers outstanding warmth.

  • Buy This Bag If: You need a top-of-the-line sleeping bag that will block wind, resist moisture, and weigh nearly nothing in your pack
  • Packed Volume/Weight: 3.8 L/1 lb. 3.6 oz. (long)
  • Insulation: 900-fill down
  • Temperature Ratings Offered (Fahrenheit): 15, 25, 30, 40
  • Roomy interior
  • Weather-resistant
  • Packable
  • Expensive
  • Less venting and breathability than other options
Check Price at Montbell

Nemo Disco 15

Nemo Disco 15 Sleeping Bags

With 64 inches of shoulder girth (Regular), the NEMO Disco ($300-320) is one of our favorite bags for slide sleeping. Ample room coupled with two of NEMO’s Thermo-Gill vents that zip open to allow more space in the torso and chest. Zip them shut on especially cold nights to keep more heat in and lessen the dead air space.

The 30-denier ripstop shell feels sturdy and held up well in testing on rough terrain. The nylon liner is also super soft and pleasant to sleep against. A final touch we appreciated is the breathable waterproof foot. Down loses warming power when wet and our feet are the first place to get saturated from condensation in the tent. It also touts one of our favorite bonuses: it comes with a compression sack.

Heavier fabric and plenty of fill mean that the Disco weighs in at a hefty two pounds and eleven ounces in the regular. This is still way lighter than a lot of bags but a full pound more than some of the ultralight bags tested.

If you sleep on your side and loathe sleeping on your back, try the NEMO Disco . This bag is well suited to the side sleeper or anyone who wants a little more room to stretch out or move around.

  • Buy This Bag If: You sleep on your side or toss and turn
  • Packed Volume/Weight: 7.2 liters/2 pounds 11 ounces
  • Insulation: 650 fill down
  • Temperature Ratings Offered (Fahrenheit): 15, 30
  • Expandable vents
  • Sturdy fabrics
  • Roomy
  • Waterproof foot
  • Heavy

Check Men’s Price at REI Check Women’s Price at REI

Sea to Summit Flame ( 15 , 25 , 35 , 48-Degree )

Sea to Summit Flame

The Sea to Summit Flame ($359-589) women’s sleeping bag is available in a wide range of weights and temperature ratings, from a 7.6-ounce liner rated to 55 degrees Fahrenheit to a 2-pound 3.1-ounce bag rated to 15 degrees F. That is pretty light for the temp rating and the Dry Down resists moisture as well.

Our complaint is that side sleeping is not easy in this bag. But to have the room to side sleep means more dead air space to heat up, which equals less warmth. So being that it is snug, this bag is warm. It’s a give and take.

This bag hits the mark for backpacking with a good weight-to-warmth ratio. Unfortunately, the fabric isn’t the most durable we’ve seen. The zipper caught on the fabric and ripped it slightly during use, and a couple of small feathers came out. This could be stitched easily enough; just something to think about.

If you sleep cold and need a light bag that packs down small, this is a good purchase.

  • Buy This Bag If: You sleep cold
  • Insulation: Ultra-Dry Down 850+ loft
  • Packed Volume/Weight: 0.7 to 7.9 L/7.6 oz. to 2 lbs. 3.1 oz.
  • Temperature Ratings Offered (Fahrenheit): Liner, 15, 25, 35, 48
  • Lightweight
  • Good warmth-to-weight ratio
  • Wide range of temperature ratings
  • Price
  • Not the most durable fabric
  • A bit difficult to get into the stuff sack

Check 48° Price at REI Check Flame Prices at REI

REI Co-op Magma

REI Co-op Magma

REI’s Magma ($399) aims to take on the sub-2-pound, ultra-packable market without breaking $400. At just over 3 liters packed, the Magma is remarkably packable for the warmth it provides. REI claims this is due to its variable baffle spacing, which maximizes heat retention while limiting pack size.

The trapezoidal footbox is ideal for people with larger feet, and we liked the multiple draw cords in the hood, which allows for easy customization for weather and body heat changes. This bag boasts a Downproof Pertex shell with water-resistant 850-fill goose down, so unless you find yourself in a washout, you should stay warm and dry.

Unfortunately, our tests found the loft to be less than desired for a 15-degree bag . Also, the snug design limited shoulder room and movement above the waist. Still, this bag packs small and is perfect for those who want great specs from a high-quality bag without the astronomical cost.

For more information, check out our full review on REI Magma .

  • Buy This Bag If: Pack space is just as important as price
  • Packed Volume/Weight: 5 L/1 lb. 6 oz.
  • Insulation: 850-fill down
  • Temperature Ratings Offered (Fahrenheit): 15
  • Extremely packable for the price
  • High down rating
  • Not as lofty as other options
  • Limited shoulder room

Check 15° Price at REI Check 30° Price at REI

Mountain Hardwear Lamina Eco AF ( 15-Degree & 30-Degree )

Mountain Hardwear Lamina Eco AF With recycled materials in every single component and no dyes, Mountain Hardwear’s Lamina Eco AF ($260-280) aims to find sustainability throughout every inch of its fibers.

The Lamina Eco AF’s shell and lining comprise 100% recycled poly. The zippers, insulation, and even the cinch cord toggle contain at least some recycled content. As you’ll no doubt notice, there’s no dye used on this bag, so this bag gets dirty quickly. If sustainability is your primary concern, that shouldn’t bother you.

As a sleep unit, the Lamina Eco AF has a very slim cut. So don’t expect much room to move your arms — or anything else. To make up for that, its recycled synthetic insulation feels lofty and warm, and it won’t be a hassle if it gets wet.

This is the perfect gift or purchase for the climate-minded and carbon footprint concerned. You can enjoy the outdoors and know you are doing less harm to the planet.

  • Buy This Bag If: You monitor your own carbon footprint closely
  • Packed Volume/Weight: 8.5 L/2 lbs. 5 oz. (30-degree, long)
  • Insulation: Synthetic
  • Temperature Ratings Offered (Fahrenheit): 15, 30
  • Glow-in-the-dark zipper
  • Lightweight
  • Lower ecological impact than other options
  • Very slim and tight
  • No venting options
  • White exterior will get dirty

Check 15° Price at Amazon Check 30° Price at evo

Therm-a-Rest Hyperion (32-Degree)

Therm-a-Rest Hyperion (32-Degree)

Consistently one of the best options for reliably warm and super-packable sleeping bags, Therm-a-Rest’s Hyperion ($430-490) offers up both attributes in spades.

Nobody in the game does plush and cozy quite like Therm-a-Rest. Coming in just over a single pound, the Hyperion saves weight with 900-fill hydrophobic down.

We also liked the svelte SynergyLink sleeping pad connectors to keep you from slipping off your mattress at night. As light as it is, it still has big, easy-to-grip zippers and a pillowy, cinchable hood.

The drawback to this product is that this snug-fitting bag is difficult to move around in. The taper from the shoulder to the feet is sharp and does not allow for wiggling or much movement. That does make it warmer with less dead space, but if you tend to toss and turn, look elsewhere.

If you find yourself in the bottom of the tent in the morning nowhere near your pad, consider this bag for your next ultralight purchase.

  • Buy This Bag If: You want as much cozy as you can cram into a pound
  • Packed Volume/Weight: 3 L/1 lb.
  • Insulation: 900-fill down
  • Temperature Ratings Offered: (Fahrenheit): 32
  • Lightweight
  • Packable
  • Plush
  • Integrates with a sleeping pad
  • Steep taper inhibits side sleeping and shifting

Check Price at evo Check Price at Backcountry

Western Mountaineering Alpinlite (20-Degree)

Western Mountaineering AlpinLite

Western Mountaineering built the Alpinlite ($585-645) to mimic everything fans loved about its UltraLite bag , but with the addition of extra shoulder room. Indeed, the size long offers up to 65 inches of shoulder girth, affording a few extra inches over most of the competition at a similar weight.

The brand also designed the shell fabric to be extra breathable, promoting as much loft as possible. And a jumbo, 3D-insulated collar helps seal in as much heat as possible for alpinists and serious backpackers.

This is one of the most expensive bags on our list but deserves consideration for those committed to quality. The high loft and down rating justifies this expense. The overstuffed draft tube and collar make for a cozy night’s sleep.

Consider this top-of-the-line bag if you are ready to spend the money on a quality product from a leader in the industry. Also be sure that you are someone who is very careful to take care of lightweight, sensitive gear. If that’s you, it’s one of the best backpacking sleeping bags money can buy.

  • Buy This Bag If: You want a 20-degree bag you can use with extra layers for even colder expeditions
  • Packed Volume/Weight: 5 L/2 lbs. (long)
  • Insulation: 850-fill down
  • Temperature Ratings Offered (Fahrenheit): 20
  • Wide girth allows extra layering in very cold conditions
  • Large draft tubes
  • High loft
  • Expensive

Check Price at Amazon Check Price at Backcountry

Feathered Friends Swallow UL (20-Degree & 30-Degree)

Feathered Friends Swallow UL

The Swallow UL ($549-609) stands as Feathered Friends’ most popular sleeping bag, providing a happy compromise between the spacious cut and light weight of the brand’s Swift and Hummingbird models. The Swallow UL packs down very small thanks to 950-plus-fill down, higher loft than most of the other bags on this list.

However, all that loft can make stuffing this bag into a stuff sack laborious and time-consuming. Also, this is one of the highest-priced bags from a reputable boutique manufacturer.

Any hardcore gear junkie knows the quality of this brand earns it a place in this list and warrants the high price. If packable size and supreme loft are what you value most, this is your bag.

  • Buy This Bag If: You need a high-loft, technical bag that blends weight savings and extra room
  • Packed Volume/Weight: 8 L/1 lb. 10 oz. (30-degree, long)
  • Insulation: 950-plus-fill down
  • Temperature Ratings Offered (Fahrenheit): 20, 30
  • Very lofty
  • Breathable outer shell
  • High down-fill rating
  • Pricey
  • High loft can make stuffing difficult
Check Price at Feathered Friends

Marmot Hydrogen (30-Degree)

Marmot Hydrogen sleeping bag

The Marmot Hydrogen ($354-388) makes the list for its solid materials. From a brand that knows how to make quality gear, it strikes a sweet balance between weight and packability. Also, Marmot’s Down Defender technology helps keep water out to ensure a dry night’s sleep.

That said, there are more comfortable options out there. This bag is very snug and restricts movement more than we would have liked. Still, the Hydrogen scores well on specs like weight and fill power, just less on the overall room. It’s still a quality bag and will be the right fit for some.

Consider buying this bag if you can’t stomach the higher price tag for comparable bags, but still want high fill power from a lightweight bag.

  • Buy This Bag If: You want an ultralight, packable bag at about 80% of the top price
  • Packed Volume/Weight: 6 L/1 lb. 7 oz.
  • Insulation: 800-fill down
  • Temperature Ratings Offered (Fahrenheit): 30
  • Sub-1.5 pounds
  • High down rating
  • Down defender
  • Restricts movement
  • Overly snug

Check Price at Amazon Check Price at Backcountry

NEMO Forte ( 20-Degree & 35-Degree )

NEMO Forte

Looking for a technical synthetic bag? NEMO’s Forte line ($170-220) may be the most full-featured non-down bag out there.

As with many of its sleeping bags, NEMO gave the Forte “gills.” On warmer nights, you can unzip the gills to help dump heat or zip them up if the night turns cold.

Plus, NEMO designed the Forte with a spoon shape to accommodate side sleepers. The bump-outs at the knees and shoulders allow sleepers a little room to twist and turn.

The Forte is on the heavy end for a bag at this temp rating. The semi-rectangular shape and bump-outs add ounces as does the synthetic insulation.

Anyone who sleeps hot or wants more room than a typical mummy bag will love the space this product offers at a steal of a price.

  • Buy This Bag If: You’re less worried about weight savings than a versatile synthetic bag
  • Packed Volume/Weight: 12 L/3 lbs. 2 oz. (20-degree, long)
  • Insulation: PrimaLoft RISE synthetic fibers
  • Temperature Ratings Offered (Fahrenheit): 20, 35
  • Affordable price
  • Thermo Gills help vent on hot nights
  • Spoon shape adds a little wiggle room
  • Heavy for backpacking
  • Bulky

Check 20° Price at REI Check 35° Price at REI

Backpacking Sleeping Bag Comparison Chart

Sleeping Bag Price Temperature Rating Weight Insulation
Mountain Hardwear Phantom 15 $550 15°F 2 lbs. 4 oz. 800 fill-down
Kelty Cosmic 20 $160 20°F 2 lbs. 10 oz. 550 fill-down
Mountain Hardwear Bishop Pass $275 15°F 2 lbs. 10 oz. 650 fill-down
Rab Mythic Ultra $650 32°F 14.1 oz. 950 fill-down
REI Co-op Magma $399 15°F 1 lb. 12 oz. 850 fill-down
Big Agnes Torchlight UL $420 20°F 2 lbs. 5 oz. 850-fill down
Enlightened Equipment Enigma
$340 50, 40, 30, 20, 10, 0°F 17.9 oz. 850 or 950-fill down
Big Agnes Sidewinder SL (20-Degree) $300 20°F 2 lbs. 4 oz. 650-fill + synthetic
Feathered Friends Hummingbird UL $509 20 or 30°F 1 lb. 8 oz. 950-fill down
Montbell Seamless Down Hugger WR 900 #3
$449 30°F 1 lb 3.6 oz. 900-fill down
Nemo Disco 15
$319 15°F 2lb. 11 oz. 650 fill down
Sea to Summit Flame $339 48°F 12.3 oz. Ultra-Dry Down 850+ loft
Mountain Hardwear Lamina Eco AF
$239 30°F 1lb 14.7oz Synthetic
Therm-a-Rest Hyperion (32-Degree)
$429 32°F 1 lb. 900-fill down
Western Mountaineering Alpinlite (20-Degree)
$585 20°F 2 lbs. 11 oz. 850-fill down
Feathered Friends Swallow UL $549 30°F 1 lb. 10 oz. 950-plus-fill down
Marmot Hydrogen (30-Degree) $369 30°F 1 lb. 7 oz. 800-fill down
NEMO Forte $219 20°F 3 lbs. 2 oz. PrimaLoft RISE synthetic fibers

Why You Should Trust Us

Every year, GearJunkie editors shut their laptops and take a long weekend to evaluate the best camping gear out there. We set up camp, unpack gear, crack beers, and spend days and nights testing, using, and abusing gear.

It’s not just about putting the gear through a battery of tests to stress it to its limits — although that does occur — it’s about using the gear the way you would.

Not only do we have decades of experience among the lot of us, but we are also critical and perceptive to the nuance of needs for each user. You may not agree with our opinions, but we strive to make our judgments fair and justified. We stick to the same standards and metrics for each product we test.

There are a lot of great sleeping bags to choose from and we are here to narrow the field and help you find the perfect one for you — one that fits your budget and your needs.

Contributor Ryan Baker camps, backpacks, climbs, and ski tours as much as he can. He currently owns four sleeping bags rated from -40 degrees Fahrenheit to 32 degrees. He prefers light, down bags with wind stopper or water repellant membranes but knows that a good synthetic bag has its place in the arsenal as well.

He has over 3 decades camping in the front and backcountry, from fishing trips to big wall climbs and high-altitude mountaineering to summer ridgeline shiver bivvies. In desperate times, he has used pine needles and a rope in lieu of a sleeping bag. From those grim experiences, he states earnestly that a good sleeping bag is a piece of gear that is worth every penny.

best sleeping bags for backpacking
GearJunkie’s reviewers giving each sleeping bag a proper test; (photo/Eric Phillips)

Buyer’s Guide: How to Choose a Sleeping Bag

A good sleeping bag is a foundational piece of gear for the outdoor enthusiast. Consider where and when you want to use your bag. Are you planning a summer outing at low elevation or a winter getaway in the mountains?

Not every bag will cover the gamut of conditions you will encounter in the outdoors but most can cover a broad spectrum. A cold-weather bag will work in the summer but nasty, stuffy, sweaty nights will ensue. Just as with any piece of gear, choose the right tool for the job.

We utilize five factors to consider when purchasing a sleeping bag: warmth, packed size and weight, materials, extra features, and value. No one bag can excel in all categories without costing you a fortune. Our goal is to direct you toward the perfect sleeping bag for your needs and your budget.

Keep in mind that brands often offer multiple sizes in one bag. There will be short, regular, long, left zip, right zip, or a women’s version. Dead air space in a bag creates more air to warm up, creating a colder bag or at least one that requires more heating time. In some situations, extra space is beneficial.

For example, in cold environments, it is nice to have a few extra inches in the bottom of the bag to stash clothes to keep warm or a water bottle filled with hot water. Deciding what side you want the zipper on can come down to handedness, connecting to a partner’s bag, or preferring a certain side to sleep on.

Women’s bags often have more space in the hips and extra insulation. Usually, that adds extra weight for the same rated bag in a men’s version.

The Magma (left) and the Phantom on the right may have the same temperature rating, but our testers agree that the Phantom is warmer; (photo/Eric Phillips)


Temperature ratings are a great place to start when selecting a sleeping bag. Most of us have a favorite campground, mountain range, or beach that we plan on visiting regularly. Determine the coldest night in that locale and you have your minimum comfort range.

The Mountain Hardwear Phantom 15 provided excellent warmth in testing with six inches of 850-fill down. Lightweight options such as the REI Magma 15 and Therm-a-Rest Hyperion save a lot of weight by using lighter fabrics or shorter zippers. They offer similar temperature ratings but usually have less loft and durability. If you know that you run cold, give yourself a margin of comfort above the listed rating.

Fill ratings for down are determined by measuring the amount of loft one ounce of down will expand to. For example, one ounce of 850-fill down lofts to fill 850 cubic inches. This means that more air is trapped in tiny fibers between the feathers compared to lower ratings, trapping more warmth. Down bags will always be warmer, by weight, than synthetic bags due to the superior loft of the down at any rating.

Enlightened Equipment’s Enigma quilt boasts a solid 850 or 950-fill down for a super warm yet exceptionally light package; (photo/Honey McNaughton)

The International Standards Organization does laboratory testing to attempt to rate sleeping bags scientifically by reducing variables. A mannequin with sensors is placed in the bag to test temperature changes in a controlled environment. Of course, we are not mannequins! Metabolic rates, preference, and tenacity can alter which bag is better for you.

Still, the ratings are a great way to compare warmth across brands. We recommend that cold sleepers choose a bag on the warmer end of the spectrum, even for summer camping.

Packed Size & Weight

Packed size is of particular importance when backpacking. The weight and packed size of a bag are directly tied to the materials it is built from. Down always packs smaller than synthetic insulation at the same temperature rating but is on average more expensive.

Anyone looking to minimize pack weight should consider something like the REI Magma 15 . This bag packs down to three liters and weighs just one pound twelve ounces. Compare that to the NEMO Forte with synthetic insulation which is much bulkier at over 3 pounds with a similar temperature rating.

The ability to pack your bag into the smallest stuff sack possible means more room for gear (or snacks!). The Rab Mythic Ultra is insanely compact and is great for warm summer bivvies when you want to be ultralight or to add to another bag to multiply the warmth.

Best Sleeping Bags stuff sack sizes
A size comparison of many of the bags on this list stored in their stuff sacks; (photo/Eric Phillips)

Materials and Construction

A bag’s insulating material will greatly alter its weight-to-warmth ratio. The downside of down (ahem) is that if it gets wet, it loses its warming power.

Virtually all modern, high-quality sleeping bags (like those in this guide) use a hydrophobic down, such as the Nemo Disco 15 . Hydrophobic down requires treating the down material with a durable water-repellent (DWR) product.

This chemical treatment coats the down and inhibits moisture from absorbing into it as readily as untreated down. This treatment also allows damp down to dry more quickly. This is not a waterproofing treatment. Hydrophobic down products will do better at resisting water, but they are not impervious to it.

Unlike down, synthetic insulation stays warm when wet but is bulkier and heavier than down. If you plan to be in heavy rain or on a raft trip, consider the NEMO Forte . The other benefit to synthetic insulation is that it is less expensive to procure than down.

Make sure to find a durable sleeping bag that will survive the rigors of trail, while also being shoved into and out of its stuff sack hundreds of times; (photo/Honey McNaughton)

As we said before, down is warmer than synthetic insulation gram for gram. As the fill power (also called CUIN) rating for down climbs higher, so does the price. A 950-fill down does a much better job of trapping heat than a 600-fill down.

That is not to say that a higher value will be warmer; the amount of insulating material is also a factor. For example, a bag with twice as much 600-fill down can maintain heat as well as a bag with half that much in 950-fill but it will consequently be markedly heavier.

For shell fabrics and liners, most sleeping bags from reputable brands will use synthetic materials that repel water and hold warmth when wet. The diameter of the thread itself used in fabrics is measured in deniers. A high denier count correlates pretty strongly to being a stronger material. So, a higher denier rating correlates with more durability.

The caveat to all this is that 20-denier Cuben fiber is stronger than 20-denier polyester because the Dyneema is stronger than the polyester fibers at the same thickness.

Some bags have a breathable membrane such as the GORE-TEX shell on the Montbell Down Hugger . Ripstop is a way of reinforcing fabric with heavier threads woven in to resist abrasion and tearing.

The shell fabric denier of the Enigma can be altered depending on how tough you think your adventure will be on it; (photo/Honey McNaughton)

Taffeta is among the most common choices to line inside of a bag. Unlike the coarse feel of ripstop, taffeta has a pleasant silky feel and is more breathable. This makes it an ideal choice as a next-to-skin fabric.

Pay attention to the fabric behind the zipper as well. A late-night trip to the bush can cause fumbling and tearing of fabric if it gets caught in the zipper, as we experienced on the Sea to Summit Flame . Top brands will sew sturdier material in the zipper zone to prevent this, but it adds weight.

Baffles in a sleeping bag are sewn separations that keep the down in place to prevent it from bunching up. It is important to consider baffle size and placement in a down bag. After years of use, the feathers tend to migrate into clumps. A little care and proper maintenance can prevent this.

The Montbell Down Hugger has done away with baffles altogether with a unique web design, while the Rab Mythic Ultra employs trapezoidal baffles to further prevent down migration.

Finally, draft tubes and collars are insulation-stuffed barriers between you and places that lose a lot of heat. This is in places such as along the zipper or around your neck. These barriers are crucial to keeping cold air out. Draft collars rest on the chest and neck area to keep the heat in the bag from escaping.

A nice lofty draft collar will keep cold air from seeping down into your bag; (photo/Eric Phillips)

Extra Features

The budget-friendly Kelty Cosmic has a great cellphone pocket, and the Mountain Hardwear Bishop Pass 15 can zip together with another bag that has a zipper on the opposite side. This is great if you want to cuddle with your partner.

A novelty in this category is the Mountain Hardwear Lamina ECO AF , which stands out because of its eco-friendly materials. Also, consider the expandable zippered gills that increase the circumference like in the NEMO Disco . This is advantageous if you are a side sleeper or want to draw your knees up at night. Most bags also allow two-way zippers to promote venting at the feet while the majority of the zipper towards the head stays zipped.

Extra features are what we consider to tip the scales between two similar products when making a difficult decision. With so many options on the market, the deciding factor when purchasing a new bag can be the difference between a static cinch cord instead of a bungee.

In our view, extra features are just that, nothing that affects the performance of a bag but only adds flair or novelty.

The Nemo Disco has two anterior zippered vents so you can regulate internal temperature; (photo/Eric Phillips)

Women’s-Specific Sleeping Bags

Some sleeping bags, such as The Big Agnes Torchlight UL , are designed with women in mind, and have features that some may find beneficial. As mentioned above, women’s bags are usually more spacious, accommodate wider hips, and have extra insulation (often in specific areas).

Some sleeping bags have a women’s-specific version that you can choose (which sometimes just means it’s shorter), while other models are designed solely for women. Sometimes the changes make a noticeable difference for women, other times a men’s or unisex model will work just fine.


You should expect to make a substantial investment for a long-lasting, high-quality sleeping bag. Don’t be surprised to see price tags that approach (or exceed) $500.

From high-priced bags like the Western Mountaineering Alpinlite to the economical Kelty Cosmic , manufacturers assure that their sleeping bags have undergone rigorous testing and development to ensure that they keep adventurers safe in some of the harshest environments.

Testing gear is serious business; (photo/Eric Phillips)

Buying a quality sleeping bag is as important as buying a good backpacking tent. It is not only a matter of comfort but also safety and well-being. Your sleeping bag is a crucial piece of gear to give you the night’s rest you need to tackle your goals and enjoy the backcountry.

This list of the best backpacking sleeping bags has something for every hiker and outdoor enthusiast — from the starry-eyed novice to the wizened wilderness sage.


What Type of Sleeping Bag Is Best?

The decision primarily is a question of insulation types. Two categories prevail: synthetic and down. Synthetic bags, like the NEMO Forte , are bulkier and overall heavier when compared to a down-filled bag at the same temperature rating. They also tend to be less expensive and stay warm when wet (unlike down).

Down-filled bags, like the Western Mountaineering Alpinlite , tend to cost more and be more delicate to abrasion and tearing as feathers can leak out, diminishing insulation. The advantage of down-filled bags is they pack extremely small and can provide more warmth with less material and therefore, less weight.

A comfy sleeping bag makes life around camp better for everyone; (photo/Honey McNaughton)

How Much Can I Compress a Down Sleeping Bag?

The short answer is more than you probably should. Compressing down feathers damages them over time but they can squeeze down magnificently.

Our testers have compressed a -40-degree bag into a 10L compression sack. That is not recommended but if you need space in your pack, you will do whatever you have to.

Packing down takes patience. Applying gentle pressure to remove air from between the down can squeeze it into tight spaces. Check with your manufacturer’s listed pack size. This is a good indication of how far to take it.

For example, one of our favorite sleeping bags, the Montbell Down Hugger , has a 3L listed pack size in the regular length. Compare that to the NEMO Forte at 12 L at a comparable temperature rating.

When you store your down sleeping bag, always put it in the large provided sack or bag about the size of a 55-gallon trash bag to prolong the life of the down and allow for full expansion while in storage.

Down sleeping bags can compress down surprisingly small for how warm and puffy they are; (photo/Honey McNaughton)

What Is a Good Weight for a Backpacking Sleeping Bag?

This is largely dependent on what your needs are. For backpacking, long hikes into a campsite with just a backpack to haul your gear, the general consensus is that you will want a pack under 3 pounds.

Ultralight sleeping bags, like the Rab Mythic Ultra , are measured in ounces, not pounds. Yet, with every ounce you sacrifice, most often you’re losing material.

This can mean less durable materials, less size or comfort, and potentially higher prices with more advanced tech. For car camping, weight will really be a secondary concern to comfort — it’s more what will fit in the trunk of your car. In that scenario, the roomy NEMO Forte starts to look pretty appealing.

Should I Get a Down or Synthetic Sleeping Bag?

When it comes to warmth and packability, nothing beats down. That’s not to say that synthetic options aren’t warm or packable — or that someday synthetic insulation might catch up to or surpass down — but down is the hands-down winner for now. Consider the 32-degree Therm-a-Rest Hyperion that packs down to 3 L.

Synthetic bags do have their place, however. By its nature, synthetic is engineered to maintain its performance characteristics when it’s wet. The same cannot be said for down. While synthetic isn’t quite as packable, it has come a long way in becoming a pack-friendly option.

For example, the Big Agnes Sidewinder weighs in at 2 pounds 4 ounces and boasts more room than most other bags we tested. If price is a primary consideration, synthetic is considerably more affordable than high-quality, high-loft down.

You want to make sure that the weight of your backpacking sleeping bag affords you plenty of warmth, but also doesn’t break your back; (photo/Honey McNaughton)

What Is the Lightest Backpacking Sleeping Bag?

From our testing, the REI Magma 15 and Rab’s Mythic Ultra are the lightest backpacking sleeping bags we recommend.

Is a 20-Degree Bag Too Hot for Summer?

Warmth ratings are a guide, not a rule. The degree listed on a sleeping bag is a measure of a bag’s comfort zone. Typically, a 20-degree bag will keep the average user comfortable at 20 degrees, but we all regulate heat differently.

Many bags, like the Kelty Cosmic 20 , feature dual zippers. This allows the bottom of the zipper to be opened as a vent while most of the bag stays zipped shut.

If you run cold, a 20-degree bag may feel too cold in 30-degree temps. If you run hot, you can get away with a 30-degree bag in 15-degree weather or below. Keep this in mind if you run hot or cold on either end of the spectrum.

Big Agnes Sidewinder
A good night’s rest starts with a solid sleeping bag; (photo/Eric Phillips)

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