3-Season Synthetic Sleeping Bags

Brands

Mountain Hardwear
Wiggy's
Eureka!
REI
EMS
The North Face
Kelty
Sierra Designs
Marmot
Big Agnes

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

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user rating: 5 of 5 (3)
Mountain Hardwear Flip 25°/40°
$140
user rating: 4.5 of 5 (9)
Wiggy's Ultra Light
$160
user rating: 4.5 of 5 (9)
Mountain Hardwear Lamina 0°
$210 - $300
user rating: 5 of 5 (2)
Eureka! Wild Basin 0
$95
user rating: 5 of 5 (2)
REI Polar Pod +25
$100
user rating: 4.5 of 5 (5)
EMS Boreal 20
$139 - $146
user rating: 4.5 of 5 (3)
The North Face Dolomite
$55 - $119
user rating: 4.5 of 5 (3)
Kelty Light Year XP 20
$100 - $109
user rating: 4.5 of 5 (2)
EMS Boreal 0
$219
user rating: 5 of 5 (1)
Sierra Designs Rosa 20
$56
user rating: 4 of 5 (20)
Marmot Trestles 15
$89 - $137
user rating: 4 of 5 (14)
The North Face Aleutian 3S Bx
$80 - $88
user rating: 4 of 5 (14)
Big Agnes Encampment 15°
$170 - $189
user rating: 4 of 5 (8)
Mountain Hardwear UltraLamina 15°
$200 - $275
user rating: 4 of 5 (7)
Marmot Trestles 30
$60 - $126
user rating: 4 of 5 (7)
Mountain Hardwear Lamina 20°
$140 - $220
user rating: 4 of 5 (5)
Eureka! Casper 15
$100 - $104
user rating: 4 of 5 (5)
Mountain Hardwear Pinole 20°
$105 - $140
user rating: 4 of 5 (3)
Eureka! Silver City 30ºF
$70 - $99
user rating: 4 of 5 (3)
Kelty Cosmic 20°
$84 - $111
user rating: 4 of 5 (3)
Marmot Trestles 0
$139 - $159
user rating: 4.5 of 5 (1)
Kelty Cosmic 0°
$180
user rating: 4.5 of 5 (1)
Eureka! Grasshopper 30
$34
user rating: 4.5 of 5 (1)
Eureka! Kaycee 0ºF
$120 - $129
user rating: 4.5 of 5 (1)
Marmot Cloudbreak 20
$185 - $241
user rating: 4.5 of 5 (1)
ALPS Mountaineering Desert Pine 20
$84
user rating: 4 of 5 (2)
Slumberjack Esplanade +20ºF
$90
user rating: 3.5 of 5 (67)
The North Face Cat's Meow
$159 - $189
user rating: 3.5 of 5 (7)
Kelty Mistral 20
$60 - $75
user rating: 3.5 of 5 (6)
Mountain Hardwear UltraLamina 32°
$148 - $255
user rating: 3.5 of 5 (3)
Big Agnes Hog Park 20°
$150 - $339
user rating: 3 of 5 (4)
Eureka! Cimarron 15
$75
user rating: 3 of 5 (2)
Slumberjack Latitude +20°F
$49 - $69
user rating: 3 of 5 (1)
Kelty Mistral 0
$82 - $99
user rating: 2 of 5 (1)
Musuc Selk'Bag 4G Patagon
$199 - $259
user rating: 1.5 of 5 (1)
Therm-a-Rest Capella 20
$150 - $209
user rating: 1.5 of 5 (9)
Slumberjack Ultimate 20°
$80
user rating: 5 of 5 (1)
Mountain Hardwear Mountain Goat 20°
$85 - $114
EMS Solstice 20
$109
Marmot Mavericks 30 Semi Rec
$85 - $108
Marmot Cloudbreak 30
$169 - $219
Mountain Equipment Matrix III
$231 - $379
Big Agnes Pristine 17
$160 - $209
Marmot Mavericks 20 Semi Rec
$78 - $118
The North Face Dolomite 20/-7
$99
Coleman Green Valley 30
$37
Mountain Equipment Matrix I
$196 - $269
Eureka! Dual Temp 20/40
$110
Mammut Ajungilak Kira 3-Season
$155
Mountainsmith Kenosha 20
$110
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