3-Season Synthetic Sleeping Bags

Brands

ALPS Mountaineering
Kelty
Moonstone
Mountain Hardwear
Marmot
Slumberjack
Therm-a-Rest
Cascade Designs
Teton Sports
Eureka!

Genders

Unisex
Men's
Women's
Kids'
Boys'
Girls'

Price

less than $50
$50 - $99.99
$100 - $199.99
$200 - $299.99
$300 - $399.99
$400 and above

Recent 3-Season Synthetic Sleeping Bag Reviews

ALPS Mountaineering Crescent Lake 20

rated 4 of 5 stars The ALPS Mountaineering Crescent Lake +20F sleeping bag is warm and comfortable, relatively roomy, and retains its loft very well. It's one of the few sleeping bags I've ever used with an accurate temperature rating. I picked up this sleeping bag in late spring, but it was too warm to use until just about a month ago. In that time I've used it maybe 15 nights, in temps ranging from around 40°F to 16-18°F, and am pretty impressed with it. I like it enough that I bought an ALPS Mountaineering Echo… Full review

Kelty Men's Mistral 20

rated 4.5 of 5 stars A great bag, at a great price. Very warm. I bought this bag from Sierra Trading with the deal flyer discount, and it came in under $100. A very nice bag. I pack it in a large Alps Mountaineering compression bag. One of two long 20 degree bags I own. The other is the Marmot Sorcerer. This is the nicer bag. Full review

Moonstone Optima

rated 5 of 5 stars I stumbled onto the Moonstone brand at a "high-end" outfitter in 1990 in Boston, Mass. I have the Optima Long and Maxima Long bags, with snap-in liner. The latter is used mostly in New England winters; the former in spring and fall cool weather. My Optima is showing its age with a couple rips on the zipper baffle this fall. Hardly a cold night in either bag. Too bad to hear, now years later, about the closure of Moonstone.  I have been convinced more than once about the value of synthetic bags… Full review

Mountain Hardwear Men's UltraLamina 15°

rated 3 of 5 stars Warm and quite confortable overall, but with some design flaws! And a zipper at risk! This bag has felt warm and comfortable, with enough room and a nice feeling in contact with body. It has stayed this way in a variety of conditions, even with light rain, and heavy condensation. (But I have not tried it yet anywhere near its low temperature range.) All of this is very important! At the same time I felt there are some important flaws: The bag has turned out to be both bigger and heavier than stated… Full review

Marmot Women's Trestles 15

rated 4 of 5 stars Works great, stays warm, even when partially wet. Heavy and bulky for backcountry, which is enough inconvenience for the star deduction. Synthetic, it's got the pros of warmth, even when it gets moisture. And let's be honest, warmth is more important when its below freezing, and worth carrying about 3 more lbs than most down bags that keep you as warm in the same temps. But that's just it, if you can afford to carry less, then good for you—a down bag especially one of those new water resistant… Full review

Slumberjack Esplanade +20ºF

rated 4 of 5 stars The style and construction is great, however I wish it would compress more than it does. Very lightweight. The collar feature is great. I have slept in 40 degree weather in just a tee shirt and shorts and was actually too warm. Had to unzip! Great bag for camping trips, but not suitable for fitting in to a backpack for more than three-night hiking trips. Full review

Marmot Cloudbreak 20

rated 4.5 of 5 stars I would recommend this bag for friends. Good bag that stays nice and warm. Stays warm all night and has a good drawstring. Perfect length for me 6'. Stays pretty dry in the stuff sack.& I use it in a tent so I'm not sure how well it would do for dew. Stuff sack is nice and tuff and it stuffs to a pretty compact size. This pack seems very well made. Marmot did a great job. I would get this pack again if I had a choice. Full review

Mountain Hardwear Pinole 20°

rated 5 of 5 stars Great bag for the budget backpacker. Compresses well for a 20deg synthetic, and keeps me warm down to rated temp! My son and I needed a couple of packable, cold weather bags for backpacking with his Scout Troop.  Considering budgeting for outfitting us both with packs, bags, sleeping pads, and miscellaneous gear, we were looking at less expensive bags. Throw in that we're in the Southeast, where humidity and rain are always in the possibilities, down bags didn't make sense, either. I put some research… Full review

Therm-a-Rest Capella 20

rated 1.5 of 5 stars Bulkier than expected. Overpriced. Way overpriced. "System" of two stretch bands to secure to same brand of matched sleeping pad fails. I slid off every night, finding hip or shoulder on ground. Bag slides OFF the pad length-wise — down off the foot of the pad, too. Too hot for temps in 40-50s. Comes with a simple stuff sack, should have a compression sack. I bought one and it compressed the bag to at least 1/2 of the provided stuff sack. The bag was too bulky otherwise. Despite being made for… Full review

Top-Rated 3-Season Synthetic Sleeping Bags

Sort by: name | rating | price | availability | recently reviewed

user rating: 4.5 of 5 (5)
ALPS Mountaineering Crescent Lake 20 reviewed Nov 30, 2014
$80 MSRP
user rating: 3.5 of 5 (7)
Kelty Mistral 20 reviewed Nov 16, 2014
$60 - $83
 
user rating: 5 of 5 (3)
Moonstone Optima reviewed Nov 1, 2014
discontinued
user rating: 4 of 5 (8)
Mountain Hardwear UltraLamina 15° reviewed Oct 31, 2014
$200 - $275
user rating: 4 of 5 (20)
Marmot Trestles 15 reviewed Oct 12, 2014
$89 - $137
user rating: 4 of 5 (2)
Slumberjack Esplanade +20ºF reviewed Oct 2, 2014
$90
user rating: 4.5 of 5 (1)
Marmot Cloudbreak 20 reviewed Sep 24, 2014
$185 - $241
user rating: 4 of 5 (5)
Mountain Hardwear Pinole 20° reviewed Aug 14, 2014
$105 - $140
user rating: 1.5 of 5 (1)
Therm-a-Rest Capella 20 reviewed Jul 3, 2014
$150 - $209
 
user rating: 4 of 5 (2)
Cascade Designs Therm-A-Nest reviewed Jun 18, 2014
user rating: 4 of 5 (1)
Teton Sports Tracker +5°F reviewed Jun 10, 2014
 
user rating: 4.5 of 5 (6)
Mountain Hardwear Crazy Legs 20° reviewed May 23, 2014
discontinued
user rating: 4.5 of 5 (1)
Eureka! Kaycee 0ºF reviewed Mar 26, 2014
$120 - $129
user rating: 3.5 of 5 (6)
REI Zephyr +15 reviewed Mar 24, 2014
discontinued
 
user rating: 3.5 of 5 (5)
Ledge Featherlite +20 reviewed Mar 12, 2014
user rating: 4.5 of 5 (9)
Wiggy's Ultra Light reviewed Feb 22, 2014
$160
 
user rating: 3 of 5 (6)
Storm Shield X-1100 reviewed Jan 20, 2014
discontinued
user rating: 5 of 5 (1)
Jack Wolfskin Touch the Clouds reviewed Jan 9, 2014
discontinued
user rating: 4 of 5 (7)
Mountain Hardwear Lamina 20° reviewed Dec 14, 2013
$140 - $220
user rating: 2 of 5 (1)
Musuc Selk'Bag 4G Patagon reviewed Nov 10, 2013
$199 - $259
user rating: 4.5 of 5 (1)
REI Zephyr +20 reviewed Sep 19, 2013
user rating: 4 of 5 (7)
Marmot Trestles 30 reviewed Sep 17, 2013
$60 - $126
user rating: 4.5 of 5 (9)
Mountain Hardwear Lamina 0° reviewed Sep 12, 2013
$210 - $300
user rating: 4.5 of 5 (10)
The North Face Snowshoe reviewed Sep 11, 2013
discontinued
user rating: 3.5 of 5 (3)
Big Agnes Hog Park 20° reviewed Aug 9, 2013
$150 - $339
user rating: 3.5 of 5 (4)
The North Face Bighorn reviewed Jul 22, 2013
discontinued
user rating: 4.5 of 5 (1)
ALPS Mountaineering Diamondback +30 reviewed Jul 16, 2013
user rating: 4 of 5 (1)
The North Face Blaze 20 reviewed Jul 16, 2013
discontinued
user rating: 3 of 5 (1)
ALPS Mountaineering Blue Springs 20 reviewed Jun 27, 2013
user rating: 4 of 5 (14)
Big Agnes Encampment 15° reviewed Jun 20, 2013
$170 - $189
user rating: 3 of 5 (2)
MontBell Super Spiral Burrow Bag #3 reviewed Jun 17, 2013
$159 MSRP
user rating: 3.5 of 5 (67)
The North Face Cat's Meow reviewed Apr 3, 2014
$159 - $189
user rating: 5 of 5 (2)
REI Polar Pod +25 reviewed Jun 11, 2013
$100
user rating: 5 of 5 (1)
ALPS Mountaineering Echo Lake 20 reviewed May 30, 2013
 
user rating: 4 of 5 (1)
Musuc Selk' Bag 3G reviewed Apr 25, 2013
user rating: 3.5 of 5 (1)
Chinook Sportster Hooded Tapered 23F reviewed Apr 3, 2013
 
user rating: 4 of 5 (2)
Ledge Featherlite 0 reviewed Apr 1, 2013
user rating: 4 of 5 (3)
Marmot Trestles 0 reviewed Mar 11, 2013
$139 - $159
user rating: 3 of 5 (12)
Slumberjack Super Guide +30°F reviewed Mar 10, 2013
discontinued
user rating: 4.5 of 5 (1)
High Peak Summit 20 reviewed Feb 25, 2013
user rating: 5 of 5 (1)
Mountain Hardwear Mountain Goat 20° reviewed Feb 23, 2013
$85 - $114
user rating: 4 of 5 (2)
The North Face Tigger reviewed Feb 23, 2013
discontinued
user rating: 4 of 5 (12)
Wiggy's Super Light reviewed Feb 23, 2013
$218 MSRP
 
user rating: 3.5 of 5 (7)
The North Face Snowshoe 3D reviewed Feb 3, 2013
discontinued
user rating: 2 of 5 (1)
VauDe Snow Cloud 800 reviewed Jan 17, 2013
user rating: 3.5 of 5 (1)
Coleman Crescent 15 reviewed Jan 17, 2013
$60 MSRP
user rating: 5 of 5 (2)
Eureka! Wild Basin 0 reviewed Nov 19, 2012
$95
user rating: 3.5 of 5 (6)
Mountain Hardwear UltraLamina 32° reviewed Jul 1, 2014
$148 - $255
 
user rating: 4 of 5 (4)
Marmot Aspen 15 Explorer reviewed Oct 31, 2012
discontinued
user rating: 4.5 of 5 (1)
Eddie Bauer First Ascent The Ignitor +15 reviewed Sep 29, 2012
$219 MSRP
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