Deal of the Week: Kelty Cosmic 0°F
A 0°F down bag for under $200 has us resting warm into the fall.
3-Season Sleeping Bags Reviews
Ideal for temperatures of about 20 degrees Fahrenheit and above, 3-season sleeping bags are best suited for spring and fall trips, as well as summers in the high mountains, when temps can dip below freezing at night. Good three season bags have features to combat cold: cinchable hoods, draft collars, and zipper draft tubes. Learn more with in-depth advice from Backpacker’s 3-season sleeping bag reviews.
This Is the New Cadillac of Ultralight Mummy Bags
Thanks to impressively lightweight materials and a crazy-high down fill, Sea to Summit’s Spark Pro Down is a fully-featured bag that weighs just over a pound.
Latest in 3-Season Sleeping Bags Reviews
Deal of the Week: Mountain Hardwear Lamina Eco AF 15°F
Go green—and save some green—on this eco-friendly sleeping bag.
The 7 Best Three-Season Sleeping Bags For Backpackers
Stay warm through hiking season with these top picks.
Kammok Arctos 20°F
The most versatile sleeping bag of 2021
Sierra Designs Night Cap 20°F
The sleeping bag with best features of 2021
NEMO Kayu 30°F
The most durable sleeping bag of 2021
Mountain Hardwear Bishop Pass 30°F
The most best all-around sleeping bag of 2021
REI Co-op Down Time 25°F
The most comfortable sleeping bag of 2021
Editors’ Choice 2021: Sierra Designs Get Down 20°F
Sleep well for less with this affordable system.
Editors’ Choice 2021: Big Agnes Sidewinder SL 20°F
Stop tossing and turning and get the backcountry beauty sleep you deserve.
The Best Three-Season Sleeping Bags of 2021
Choosing a go-to sleeping bag can be a daunting task, but we’re about to make your life easier. After testing the field’s top 38 models, we’ve determined that these six cocoons are the tops for three-season warmth and comfort.
Backpacker’s Complete Guide to the Best Three-Season Sleeping Bags
Dial in perfect backcountry sleep for the majority of the hiking season with the best three-season sleeping bag for you.
Big Agnes Star Fire UL 20°F
Most weatherproof 3-season sleeping bag
NEMO Forte
Roomiest 3-season sleeping bag
Therm-a-Rest Hyperion 20°F
Lightest 3-season sleeping bag
Marmot Trestles Elite Eco 20°F
Best value 3-season sleeping bag
Feathered Friends Egret YF 20°F
Best Fit for Women
Sierra Designs Nitro 800
Best all-around sleeping bag
NEMO Tempo 35°F
Best all-around budget sleeping bag
Mountain Hardwear Bozeman 15°F
Best value sleeping bag
Big Agnes Torchlight UL 20
Quiver-killer sleeping bag
Therm-a-Rest Vesper 45
Lightest sleeping bag
Marmot Yolla Bolly 30
Most comfortable sleeping bag
MontBell Seamless Down Hugger WR 900 #3
Best ultralight sleeping bag
Exped Waterbloc Pro
Best sleeping bag for bad weather
The North Face One Bag
Most versatile
Sea to Summit Ascent AcII
Most comfortable
Mountain Hardwear Lamina Eco AF 15°F
Most eco-friendly
Sea to Summit Flame FmIII
Women's pick
REI Co-op Magma 30
Best value sleeping bag
Therm-a-Rest Hyperion 20°F
Cut weight and stay warm with this featherweight bag.
Enlightened Equipment Prodigy
Check out Liz "Snorkel" Thomas's author page.
Big Agnes Boot Jack 25 Sleeping Bag
Get a legit, three-season down sleeping bag that’s true to its temp rating for less than $200.
Vaude Arctic 800 Sleeping Bag
Smart features make this synthetic three-season sleeping bag especially cozy on subfreezing nights.
The North Face Superlight 15 Sleeping Bag
A beautiful marriage of weight, warmth, and packability, this may be the only sleeping bag you’ll ever need.
Katabatic Sawatch Quilt
Premium materials and a semi-quilt design make this one of the lightest three-season options available.
Mountain Equipment Glacier 400 Super Light Sleeping Bag
An armored shell protects this weather-resistant sleeping bag from all but the worst conditions.
Eddie Bauer First Ascent Airbender
This three-season bag and integrated pad create a lightweight, toasty sleep system that punches above its weight.
Kelty Dualist 22
This three-season bag features a combo of down and synthetic insulations and an attractive price tag.
Marmot Scandium 20
This three-season bag will let you press deep into shoulder season.
Sea to Summit Spark Sp III
Premium materials and efficient design give this three-season bag one of the best warmth-to-weight ratios we’ve seen.
Feathered Friends Flicker 20
Most ultralight sleeping bags are one-trick ponies. A full-length center zip and other features boost the Flicker’s versatility.
Editors' Choice: Mountain Hardwear HyperLamina Spark
Innovative construction brings down-like weight and packability to a synthetic bag.
Big Agnes Boot Jack 24 Sleeping Bag
You get the performance of a three-season down bag at the price of a synthetic.
L.L.Bean Katahdin CT Sleeping Bag
It’s the most affordable 0°F bag we tested this year, and its temp rating is conservative.
NEMO Coda 0 Sleeping Bag
Two gills on top of the bag allow you to fine-tune the warmth for a variety of conditions.
MontBell Burrow Bag #0
Get maximum comfort in this mummy—no matter how much you toss and turn.
7 Tough Sleeping Bags
Three-season bags that are warm, comfortable, and ready for abuse.
The North Face Cat’s Meow Sleeping Bag Review
A longtime staff favorite the Cat's Meow, from The North Face, receives a rugged facelift.
Big Agnes Encampment 15 Sleeping Bag Review
You can drag this burly bag around camp, using it for everything from a blanket for stargazing to a makeshift “sofa” by the fire.
Therm-a-Rest Saros 20 Sleeping Bag Review
It’s a solid synthetic bag at a great price, with a classic mummy cut that pleased everyone.
Mountain Hardwear Lamina 20 Sleeping Bag Review
Thanks to its unique welded construction, it’s the most packable (15 by 7 inches) synthetic bag in the test.
Rab Ascent 500 Sleeping Bag Review
Through four months of nonstop use—often in miserably damp conditions—the Ascent lofted up like new every night.
Mountain Equipment Glacier 500 Sleeping Bag Review
It has the best warmth-to-weight ratio here; testers pushed it 10 degrees below its 23°F rating.
NEMO Strato Loft 25 Sleeping Bag Review
The rectangular shape, combined with a little stretch, makes this the most comfortable bag in the test.
Editors' Choice Gold 2014: Western Mountaineering Alpinlite
Impeccable craftsmanship and top-shelf materials make this bag a perennial favorite.
Editors' Choice: MontBell Down Hugger 900 #2
Innovative sewing techniques deliver a whole new level of ultralight comfort.
Editors' Choice 2014: Sierra Designs Backcountry Bed
Forget what you know about sleeping bags. This revolutionary sack throws out the zipper, adds a blanket-like quilt, and increases the comfort exponentially.
Kelty SB 20 Sleeping Bag Review
The SB offers the top-shelf performance of 800-fill DriDown at second-shelf price.
Mountain Equipment Matrix III Sleeping Bag Review
A down and synthetic bag that's the best of both worlds.
Crux Torpedo 500 Sleeping Bag Review
This bag-bivy combo can handle most any forecast in its temp range.
Recreational Equipment, Inc. (REI) Radiant 20F PLUS
Think outside the bag with this minimalist blanket from Brooks-Range.
The North Face Aleutian 3S Down
A packable synthetic sleeping bag with an extremely durable DWR shell
Gear Review: Brooks-Range Elephant’s Foot
Check out Glenna Xie's author page.
Gear Review: Sea to Summit Micro MC III
Check out Glenna Xie's author page.
Gear Review: L.L.Bean Down Mummy with DownTek
Check out Glenna Xie's author page.
Gear Review: Kelty Ignite 20
The affordable three-season down bag from Kelty.
Gear Review: Sierra Designs DriDown Cal 30
The best all-around water-resistant down bag by Sierra Designs.
Gear Review: Big Agnes Bellyache Mountain SL 17/Lithia Spring SL 15
The lofty and roomy 700-fill DownTek Bag from Big Agnes.
Big Agnes Shoestring
This synthetic bag from Big Agnes is as breathable and lofty as down.