Updated on January 9, 2024

As any long distance hiker will tell you, packing light is not just a matter of preference. It is essential for the completion of a backcountry adventure, especially a multi-day one. The best lightweight sleeping bags don’t add any weight to your shoulders so you can tackle mountain trails for hours on end without losing steam. They also can be compressed to a minimal size, so they don’t take up any extra space in your pack.

We know that choosing a lightweight sleeping bag can be tricky, with different shapes and features to consider that are all made to support you in various climate conditions. That’s why we’ve selected the best lightweight sleeping bags available on the market today, to help you decide what you should invest in before you set out for your next ultralight hike.

For a complete analysis of all backpacking sleeping bags, check out the buyer’s guide Best Backpacking Sleeping Bags.



Best Lightweight Sleeping Bag >> Feathered Friends Hummingbird UL 20

Best Lightweight Sleeping Bag For Women >> Feathered Friends Egret UL 20

Most Affordable & Lightweight Sleeping Bag >> Therm-A-Rest Space Cowboy 45



Comparison Table - Best Lightweight Sleeping Bags

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NameInsulationTemp RatingWeightFill PowerFill WeightVolumePriceRatingReview
Feathered Friends Hummingbird UL 20Down20 F1.5 lbs95014.6 oz09.0 L$5394.9Read Review
Feathered Friends Egret UL 20Down20 F1.4 lbs95017.3 oz09.0 L$5394.7Read Review
Therm-a-Rest Space Cowboy 45Synthetic52 F1.2 lbsPolyester04.2 oz02.0 L$1404.5Read Review
Therm-a-Rest Hyperion 20Down32 F1.2 lbs90012.0 oz03.0 L$4004.2Read Review
Western Mountaineering UltraLiteDown20 F1.8 lbs85017.0 oz08.7 L$5254.9Read Review
Marmot Hydrogen 30Down33 F1.4 lbs80010.9 oz06.8 L$3604.4Read Review
Therm-a-Rest Corus 32Down32 F1.2 lbs65012.0 oz06.2 L$2204.3Read Review
Zpacks Classic 20Down20 F1.2 lbs90013.7 oz06.7 L$3994.6Read Review
REI Co-op Magma 15Down28 F1.7 lbs85015.9 oz05.2 L$3894.5Read Review
Enlightened Equipment Enigma 20Down20 F1.3 lbs85015.4 oz07.0 L$3154.5Read Review
NameInsulationTemp RatingWeightFill PowerFill WeightVolumePriceRatingReview

Temp ratings refer to the EN or ISO Comfort rating.

Volume refers to the compressed volume of the sleeping bag.

Weight, fill weight, volume and price are shown for the regular size.


Want to learn more about a technical term? Check out our Features Explained section below.

Need buying advice? Take a look at these Things to Consider.

Reviews - The Best Lightweight Sleeping Bags for Backpacking

Feathered Friends Hummingbird UL 20

  • Fill Weight: 14.6 oz
  • Insulation: Down
  • Length: 72 inches
  • Weight: 1.5 lbs
  • Shape: Mummy
  • Volume: 09.0 L
  • Temp Rating: 20 F
  • Fill Power: 950
  • Trapezoidal footbox
  • Continuous baffles
  • 3D contoured hood
Feathered Friends Hummingbird UL 30


The Feathered Friends Hummingbird UL 20 is a super light and packable three season sleeping bag. It’s our pick for the best ultralight backpacking sleeping bag.

What we loved the most about the Hummingbird is the conservative, even borderline generous temperature rating. This is not something we could say about a lot of other ultralight bags out there. The Hummingbird is stuffed with 950+ goose down which makes it extremely warm and light.

One drawback of the Hummingbird is the fit is pretty snug. If you’re a side sleeper or a bigger guy or gal, you might find the narrow dimensions claustrophobic. If you toss and turn a lot and would prefer a more spacious bag, check out the Feathered Friends Swallow and Swift. Another downside is since Feathered Friends is a cottage manufacturer, stock can sometimes be limited and wait times can be long. If you love the idea of owning a handmade sleeping bag that is tailored to your needs, be sure to order well ahead of your next trip.

The Hummingbird UL is in close competition with Western Mountaineering’s UltraLite. which is also featured on this list. While both are excellent choices for serious backpackers, the Hummingbird is 5 ounces lighter, making it a winner for those who are meticulous about cutting weight.

The Hummingbird UL is also available in a 30-degree version.

Feathered Friends Egret UL 20

  • Fill Weight: 17.3 oz
  • Insulation: Down
  • Weight: 1.4 lbs
  • Volume: 09.0 L
  • Temp Rating: 20 F
  • Fill Power: 950
  • Trapezoidal footbox
  • Passive collar
  • Generous draft tube
Feathered Friends Egret UL 20 Backpacking Sleeping Bag


The Feathered Friends Egret UL 20 is a high quality three season sleeping bag that is specifically designed for female backpackers. 

What we love the most about this sleeping bag is its attention to detail and female tailored fit. There is extra fill around the chest and in the foot box, two areas where women lose more heat than men. Its 950+ fill is super fluffy and toasty, making it a great option for spring to fall camping. When it comes to quality, weight, packability and warmth, the Egret beats all the other female specific bags, which is why it’s our pick for the best women’s backpacking sleeping bag. 

The biggest drawback is the price, but for this level of comfort and quality, we believe it is worth it considering it has an excellent warmth to weight ratio. Another complaint is the sizing isn’t right for everyone. The Egret comes in two sizes: 5’3” and 5’9”, if you’re somewhere right in between, say 5’6”, you might find the 5’9” option too long. This extra space traps cold air, making the bag feel colder overall. And, the 5’3” option would be too tight to have the hood fit over your head comfortably. If this might be an issue for you, you can check out the unisex version of this bag, called the Swallow which has a 20-degree and 30-degree option. 

The Egret UL is also available in a 30-degree version.

Therm-a-Rest Space Cowboy 45

  • Fill Weight: 04.2 oz
  • Insulation: Synthetic
  • Weight: 1.2 lbs
  • Shape: Mummy
  • Volume: 02.0 L
  • Temp Rating: 52 F
  • Fill Power: Polyester
  • Water Resistant
  • Highly Compressible
  • Cinchable Hood And Snag Free Zipper


The Therm-A-Rest Space Cowboy 45 is an awesome ultralight mummy-shaped sleeping bag. Its compressed volume of 2 liters makes it highly packable and lightweight. Because this sleeping bag only withstands 45°F, it is better suited for warmer weather and summer camping. However, you can layer it with other quilts using blanket loops on the bag, expanding its versatility. Additional removable connectors even let you fasten a sleeping pad to the bag. 

The Cowboy 45 uses water-resistant synthetic fill that retains its insulation abilities even when damp. It is strategically placed in certain areas to optimize warmth and weight. The ThermaCapture lining efficiently traps body heat. Additionally, a cinchable hood also guards against unwanted drafts. All these features make the Space Cowboy 45 a great companion for backcountry travels.

Therm-a-Rest Hyperion 20

  • Fill Weight: 12.0 oz
  • Insulation: Down
  • Weight: 1.2 lbs
  • Shape: Mummy
  • Volume: 03.0 L
  • Temp Rating: 32 F
  • Fill Power: 900
  • Lightweight And Small Packing Size
  • Ergonomic Shape And Long Zipper
  • Moisture Resistant Fabric

The Therm-a-Rest Hyperion 20 is a lightweight high quality bag that was designed to help long distance hikers shave pounds from their load.

What we love the most about this bag is its warmth to weight ratio. It’s filled with 900 down which makes it so warm and light. It also packs down quite small, making it great for saving room in your backpack. A little feature we liked was there are two straps underneath it which you can attach to your sleeping pads to keep the bag from slipping off. The Hyperion comes with a compression bag which helps get the bag down to about the size of a large water bottle. There is more insulation on top (70%) and less on the bottom (30%), this saves weight but it also means the design is optimized for sleeping on your back. 

What this bag gains in weight saving, it pays for in comfort. The cut is slim, very slim. So, if you’re a bigger dude or lady, you will probably feel constricted in this thing. The Hyperion is very narrow throughout and tapers down even more at the feet. The zipper only goes halfway down the bag, which does shave some ounces but it also means you can’t vent your feet. And, while we’re talking about the zipper, let’s just say it has some room for improvement. There’s a bit of fabric that runs along the zipper but it still snags from time to time. 

The Hyperion 20 is excellent value for money and is cheaper than other high end bags on this list, but it is lacking some features like a draft collar that lets you seal the bag around your face. Also, while it’s rated to 20 degrees, its comfort rating is 32 degrees. So we only recommend this  bag for above freezing conditions. If you’re the kind of hiker who doesn’t mind sacrificing some comfort in order to go fast and light, the Hyperion 20 could be the perfect bag for you. 

This bag also comes in a 32 degree version.

Western Mountaineering UltraLite

  • Fill Weight: 17.0 oz
  • Insulation: Down
  • Weight: 1.8 lbs
  • Volume: 08.7 L
  • Temp Rating: 20 F
  • Fill Power: 850
  • Made In The U.S.A
  • Very Lofty Down Fill For Comfort
  • Lightweight Design
Western Mountaineering UltraLite Backpacking Sleeping Bag

The Western Mountaineering UltraLite is an ultra light and ultra premium backpacking sleeping bag that is our pick as the best overall choice.

What we love the most about this bag is its balance between weight, quality, versatility and comfort. It is rated to 20-degree and only weighs 17oz making it an excellent choice for fast and lite colder weather trips. The UltraLite’s horizontal baffle design allows you to move the feathers to the back of the bag, making it less warm for spring and mild summer conditions. 

The biggest downside of the UltraLite is its price tag. At $525, it’s one of the priciest bags on our list. However, if you’re a true backpacking junkie who wants an all around awesome bag, it might be a worthy investment. 

A close contender to the UltraLite is the Feathered Friends Hummingbird YF20 (and similar bags within their range). If you’re having trouble deciding, one feature we loved about the UltraLite that we didn’t find on others is the full goose down draft collar. This lets you bunker down and seal your body heat, a much appreciated feature on chilly nights.

Marmot Hydrogen 30

  • Fill Weight: 10.9 oz
  • Insulation: Down
  • Weight: 1.4 lbs
  • Shape: Mummy
  • Volume: 06.8 L
  • Temp Rating: 33 F
  • Fill Power: 800
  • Strong And Durable
  • Broad, Long, And Roomy
  • Extra Zipper On The Side

The insulating features of the Marmot Hydrogen Down Sleeping Bag will surely keep you warm even through colder nights. An insulated tube covers the 2-way anti-snag zipper to prevent any cold breeze from seeping in. A fold-down second zipper equips you with ventilation, so you won’t overheat on warmer nights. Moreover, an insulated hood will warmly cradle your head thanks to its multi-baffle design that keeps the down from moving by separating it into different compartments. And cinching drawcords at the top of this bag allow you to secure the hood around your face to prevent wind from chafing your face all night. 

Unlike a caterpillar cocoon, this mummy sleeping bag is durable and sure to live a long life. It has two hang loops for storing, drying, or just airing out the bag to help increase its lifespan with proper care. Another nifty feature includes an internal stash pocket perfect for keeping nighttime essentials and valuables nearby. Considering all these specs, the bag’s super light weight of 1 lb. 7 oz. is almost unbelievable.

Therm-a-Rest Corus 32

  • Fill Weight: 12.0 oz
  • Insulation: Down
  • Weight: 1.2 lbs
  • Shape: Mummy
  • Volume: 06.2 L
  • Temp Rating: 32 F
  • Fill Power: 650
  • Compact Design
  • Water And Moisture Repellent
  • Fast Drying

If you are looking to go on a camping trip in the summer, spring, or fall, the Therm-a-rest Corus 32 is a safe bet. It is fairly affordable, able to endure 32°F, and lightweight enough to reduce stress on your shoulders. While these aren’t top notch characteristics, this product does provide a fantastic bag and pad connection system. With 8 snap loops, it is secure and easy to use, allowing you to layer other quilts with it. Plus, a loop kit includes 8 convenient stick-on patches to fasten a pad to the quilt. 

Draft tubes line the sides of the quilt, guarding against cold air. Corus 32 also features an elastic foot-box that holds together your feet and your pad, securing warmth. The quilt has cords at the top that further let you snap the quilt shut with only your head poking out.

Zpacks Classic 20

  • Fill Weight: 13.7 oz
  • Insulation: Down
  • Weight: 1.2 lbs
  • Volume: 06.7 L
  • Temp Rating: 20 F
  • Fill Power: 900
  • Roll top dry bag included
  • Vertical baffles on the upper body
  • Rectangular and roomy foot box
Zpacks Classic 20 Backpacking Sleeping Bag

The Zpacks Classic 20 is an ultralight high end sleeping bag that is a favorite among minimalist backpackers and thru-hikers. 

What we loved the most about this bag is its hybrid design. It’s like a quilt and a sleeping bag had a baby. It has a ¾ length zipper and no hood, so you can either zip it all the way up like a traditional bag or open it all the way up like a quilt. This design makes the Classic 20 super versatile which is great for people who want the best of both a bag and a quilt. Hammockers will also really appreciate this concept. This bag is made 950 hydrophobic down that repels water if it gets wet. This type of down is really puffy, so it uses less feathers to create loft, making it much lighter and packable than lower quality down options.

The biggest drawback with the Zpacks Classic is its shell is made of a 7 denier nylon which is very thin and delicate. It could easily get caught on something and rip. Of course this is the price to pay for a super light sleeping bag. Also, there’s no hood. Z packs make a hood you can buy separately or you could just use a beanie or wear a down jacket that has a hood on chilly nights. This is one of the more expensive options on our list, but if weight and versatility are your top priorities, it’s worth forking over the cash.  

If you want a true quilt, check out the Zpacks Solo Quilt

This sleeping bag is available in three different lengths (short, medium and long) and three lengths (broad, slim and standard). 

The Zpacks Classic also comes in a 10 degree and 30 degree option.

REI Co-op Magma 15

  • Fill Weight: 15.9 oz
  • Insulation: Down
  • Weight: 1.7 lbs
  • Shape: Mummy
  • Volume: 05.2 L
  • Temp Rating: 28 F
  • Shell: Ripstop Nylon
  • Fill Power: 850
  • Generous Knee and Foot Room (for increased comfort and thermal efficiency)
  • Zipper Cover and Anti Snag Strip (for easy zipping)
  • Insulated Shoulder and Neck Yoke (which fits around your neck and shoulders to prevent heat loss)

The REI Co-op Magma 15 is an ultralight three season backpacking sleeping bag. It is a part of REI’s premium line of gear which is a great choice for hikers who want a top-tier bag without the heart attack-inducing price tag. 

The Magma 15 offers a bit more mobility for those who tend to toss and turn at night. It is spacious in the knee and foot area, meaning that you can switch positions more easily than with other, slimmer bags. Even with its wider design, this bag will still keep you toasty, even on chillier nights. 

Rated at 28 degrees F (comfort level), the goose down filling will still keep you warm. Plus, its insulated yoke (the part of the bag that fits around your neck and shoulders) is designed specifically to prevent heat loss, keeping you comfortable and warm all through the night.

Enlightened Equipment Enigma 20

  • Fill Weight: 15.4 oz
  • Insulation: Down
  • Weight: 1.3 lbs
  • Volume: 07.0 L
  • Temp Rating: 20 F
  • Fill Power: 850
  • Ethically sourced down from an RDS certified supplier
  • Sewn-closed foot box
  • Stuff sack included
Enlightened Equipment Enigma 20 Backpacking Sleeping Bag

The Enlightened Equipment Enigma 20 is a minimalist ultralight quilt that is quickly becoming a favorite of long distance hikers.

What we love the most about the Enigma is its round foot box that is sewn shut. This design gives you more foot room while trapping in heat. This makes it a good option for backpackers who are transitioning from using a traditional sleeping bag to using a quilt. All of Enlightened Equipment’s quilts are hand sewn and the quality is top notch. They overfill their quilts by 30% so instead of stuffing them to the minimum amount needed to fill the bag, they pack in extra down to help with any loss in loft due to moisture or dirt. Thru hikers who plan to use this thing for weeks on end without washing it will appreciate this consideration.

Quilts do come with some drawbacks and the Enigma is no exception. Since it is just like a big blanket, it doesn’t have a hood so you’ll want to wear a beanie or down jacket on chilly nights. It also doesn’t have a back so it can be tricky to fully seal up the quilt in cold conditions. 

Enlightened Equipment is a cottage manufacturer based in Minnesota. All of their quilts are highly customizable, which is a great option for thru hikers who really want to have their gear dialed in. It can take over a month for a custom quilt to arrive but luckily, EE does have stock options for those who just want a standard option and don’t have time to wait for a custom quilt to arrive. 

The Enigma is available in 0, 10, 20, 30, 40, and 50 degree versions.






On top of taking up a lot of backpack space, traditional sleeping bags can be heavy to carry on your shoulders. Lightweight and ultra-lightweight sleeping bags, on the other hand, are designed for backpackers trying to travel with minimum gear.

Most lightweight sleeping bags are made for two or three season use, as they contain less insulating material. It is possible to find advanced winter sleeping bags that are compact and easy to carry, however these tend to still weigh at least two pounds, making them relatively heavy compared to other lightweight bags.

Lightweight sleeping bags weigh under two pounds, while ultra-light sleeping bags can weigh as little as 15 ounces. Reduced weight normally comes at a price though, with compact sleeping bags costing hundreds of dollars.



Sleeping bags can be rectangular, semi-rectangular and mummy-shaped. Each of these designs comes with different pros and cons, so keep their characteristics in mind when you go to buy a sleeping bag.

Rectangular-shaped sleeping bags are the least insulated, but offer more moving space than semi-rectangular and mummy-shaped sleeping bags. If you tend to move often during the night, a rectangular sleeping bag may provide extra comfort, but consider that it will also be bulkier when packed.

Semi-rectangular sleeping bags are narrower around the legs and feet to reduce heat loss where it’s most needed. They are lighter and more compact than rectangular-shaped sleeping bags, but still provide some moving space for your body.

With their anatomical shape, mummy-shaped sleeping bags offer maximum insulation, but minimal moving space. They are usually lighter than other categories of sleeping bags, as less material is used to produce them.



The number normally read after a sleeping bag’s name refers to the lowest temperature at which it ceases to be comfortable to sleep in. Most sleeping bags are tested by independent organizations that establish the temperature rating.

Lightweight sleeping bags tend to have a higher temperature rating (meaning they’re better for warmer weather), as the insulating material makes up for much of the mass. As a reference, three-season sleeping bags will have a rating of 20°F, while summer sleeping bags start at 32°F. Sleeping bags for winter camping are hardly ever lightweight, but there can be a big difference between different models.



Sleeping bags are traditionally filled with either synthetic fiber or down. While synthetic sleeping bags are fast-drying and non-allergenic, they are not as well insulated as sleeping bags filled with goose or duck down. Down sleeping bags offer more protection in colder temperatures and are more lightweight, however they tend to be more expensive than their synthetic counterparts.



When choosing a sleeping bag to go hiking with, check how much space it will occupy in your backpack. Lightweight sleeping bags may not put pressure on your shoulders, but they are not necessarily always compact when packed. The volume of a packed sleeping bag is measured in liters and you should aim at maximum of 3 liters if your priority is compactness. When storing your sleeping bag at home however, remember that it should always be kept outside of the stuff-sack, either hanging or loosely stowed in a large breathable sack.




Heat channels

Vertical gates placed along the entire length of the sleeping bag, designed to keep the insulating material in place while letting the body heat circulate from chest to toes.


Pad cords

A set of cords connected to a sleeping pad that can be used to tighten your sleeping bag around your body to reduce heat loss.


Draft tube

A section of the sleeping bag filled with insulating material that runs along the zipper, stopping the cold air from sneaking in.


Durable water repellent (DWR)

A special kind of coating used on the shell of the shell of the sleeping bag to make it water-resistant.



Hydrophobic refers to any material that resists water (AKA, a material that is water-repellent).



The stitchings that create a series of compartments that stop the insulating material from moving inside the sleeping bag. By keeping the insulating material separated, the whole body stays protected from the cold.


Duck or goose down

The fine plumage found under the feathers of ducks and geese, used as fill in sleeping bags for maximum insulation and warmth.


Synthetic insulation

Polyester fibers that are used as insulating material to prevent heat loss. Synthetic insulation materials can vary widely in quality and tend to be less insulating than down. On the other hand, they dry faster and are cheaper.


Sleeping bag shell

The outer layer of the sleeping bag, often built in synthetic material and water repellent coating.


Snag-free zippers

Zippers engineered so that they don’t catch the sleeping bag’s fabric when used.