Warm Weather Synthetic Sleeping Bags

The best warm weather synthetic sleeping bags, reviewed and curated by the Trailspace community. The latest review was added on June 20, 2019. Stores' prices and availability are updated daily.

Recent Warm Weather Synthetic Sleeping Bag Reviews

rated 5 of 5 stars
Alpine Design 45-degree Micro Lite Mesa Rec Bag

Great addition to one's warm weather gear kit. $4 at Amvets seconds store. Tried to find Alpine Design on net, nothing! Used with no clothing to 45° F.; works well. With base layer, would go much lower.  Wondering what the fabric and materials used are? The insulation factor is pretty good, must be some kind of fabric magic at work. Wonder what Alpine Design has to say about that? Anyone know how to locate that company? Full review

rated 4 of 5 stars
Therm-a-Rest Space Cowboy 45F

The Space Cowboy is a nicely featured 45˚F/7˚C sleeping bag for those seeking a highly compressible, lightweight synthetic sleeping bag option. This bag is readily stuffed into pack crevices or its supplied stuff sack, taking up less room at lower weight than a number of similarly rated bags (albeit at higher price), while providing mummy bag coziness with a draft tube and draft collar for unseasonably cool nights. In the American South where I live, we’ve had the first few flashes of summer-like… Full review

rated 0.5 of 5 stars
Ozark Trail Sleeping Bag

This is the most sh*t sleeping bag I have ever used in my life. There is absolutely no way to fix the damn chain. Ozark Trail, make better sleeping bags! Full review

rated 4.5 of 5 stars
Marmot Pounder

I'm still using this bag that I bought in 2008 or 2009. It has taken me from freezing temperatures to the 80's in a hammock (I just laid on it to keep the mosquitoes from biting!). It's not meant for extremely cold temperatures, but I use it as part of a sleep system that includes a silk liner and a crinkly emergency bivvy sack. On a freezing cold wet night, I'll use all three. The silk liner gives me another 10-15 degrees of warmth, and the emergency bivvy another 20 degrees of warmth. I've used… Full review

rated 3 of 5 stars
Marmot NanoWave 35

Well built. Great for summer nights but not for cold weather. I am a Florida hiker/backpacker. I am one of those people northerners laugh at because I wear winter jackets when the weather reaches 65°F and below. Knowing my blood is thinner and I have my own internal insulation (weighing in at 150 lbs), I was hoping this bag would keep me warm. Although this bag is rated to 35°F, I was cooly uncomfortable at 52°F and below. On all occasions where the weather dipped below 55°, I packed wool pajamas,… Full review

rated 4.5 of 5 stars
Coleman Bambusa

It is great for three-season camping and packs down small enough to fit on a bike rack. I bought mine years ago and have camped with it several times. I found it to be great for fitting on my bike pannier rack with my bike packing tent and inflatable mattress. For comfort in extreme cold, I've bought a silk liner to add another season rating, but haven't needed to use it...yet. Full review

rated 5 of 5 stars
Deuter DreamLite 500

Sweet, durable, comfortable, holds up to its ratings very well. If you don't have one, prioritize getting your Dreamlite. I truly love mine. For the guy with the cord issue, I thought the exact thing. Even considered sliding barrel lock up to perfecto tying a knot and cutting the extra off. But on one trip someone took my backpack. Luckily all my gear and sacks were in the tent with me. Man, figuring out how to lug my gear back out the trail without my backpack was a lot of trial by error and I… Full review

rated 4 of 5 stars
Sierra Designs Forty Winks

Good well-rounded synthetic bag. Medium weight, medium packed size, medium warmth, and durable. This was my first sleeping bag I ever bought, purchased in 2001. I have been happy with the bag, and I think it is a good bag in all categories.  It is not a very lightweight bag, nor does it pack down very small, but it's a mid-priced synthetic bag and I think it is everything that it's supposed to be. Overall I've been pleased with it as a general purpose, well-built bag. Since then I almost always… Full review

rated 4.5 of 5 stars
CRAZO Premium Hooded Envelope Sleeping Bag

This is a well-built envelope sleeping bag with mummy hood which is good for most three-season camping. The extra long and large size (86.6" x 31.5" ) assures comfort for adults even up to 6'11", and it allows you to use a liner or wear extra clothes to be warmer if it might get colder than the rating. As a retailer of this sleeping bag, I'd tested it several times with my friends before I placed the order. I have to say that I really love this sleeping bag. Honestly, I don’t like the narrowness… Full review

user rating: 5 of 5 (1)
Mountain Hardwear Lamina Z Spark 34
$159
user rating: 4 of 5 (2)
The North Face Dolomite 40F/4C
$79 - $89
user rating: 4 of 5 (1)
The North Face Lynx
$139
user rating: 4 of 5 (1)
Peregrine Saker 35
$80
user rating: 4 of 5 (1)
Marmot NanoWave 55
$69 - $79
user rating: 4 of 5 (1)
Therm-a-Rest Space Cowboy 45F
$130 - $159
user rating: 3.5 of 5 (1)
Marmot NanoWave 45
$79 - $88
user rating: 3 of 5 (1)
Marmot NanoWave 35
$89 - $99
user rating: 5 of 5 (5)
Ferrino H.L. Micro
user rating: 5 of 5 (2)
Alpine Design 45-degree Micro Lite Mesa Rec Bag
$30 MSRP
 
user rating: 4.5 of 5 (3)
The Backside Backsider X-Fibre 35
user rating: 4.5 of 5 (3)
Mountain Hardwear Lamina 45°
$120 MSRP
user rating: 4.5 of 5 (3)
Mountain Hardwear Lamina 35°
$140 MSRP
user rating: 5 of 5 (1)
Kelty Gemini 45 Double
 
user rating: 5 of 5 (1)
Vango MP 300 Lite
user rating: 5 of 5 (1)
Cocoon Silk TropicTraveler Sleeping Bag
user rating: 5 of 5 (1)
Sierra Designs Backcountry Bed Duo SYN 1.5-Season
user rating: 5 of 5 (1)
Kelty Tumbler 40/60
user rating: 5 of 5 (1)
High Peak Sirius
user rating: 4 of 5 (3)
Deuter DreamLite 500
$95 MSRP
user rating: 4.5 of 5 (1)
Marmot Mavericks 40 Semi Rec
$75 MSRP
user rating: 4.5 of 5 (1)
MontBell Super Spiral Burrow Bag #5
$139 MSRP
user rating: 4.5 of 5 (1)
Lafuma Extreme 650 Pro
user rating: 4 of 5 (2)
Columbia Reactor 35 Mummy
user rating: 4 of 5 (2)
EMS Velocity 35
$189 MSRP
user rating: 4 of 5 (1)
Wiggy's Desert
$152 MSRP
user rating: 4 of 5 (1)
Kelty Light Year XP 40
$110 MSRP
user rating: 4 of 5 (1)
Exxel Outdoors 32° Sleeping Bag
user rating: 4 of 5 (1)
VauDe Snow Cloud 350 43F
user rating: 4 of 5 (1)
The North Face Aleutian 50/10
 
user rating: 4 of 5 (1)
Alpine Design Microlite Terrain 45 Degree Mummy
user rating: 4 of 5 (1)
Outbound Bike & Hike +44°
user rating: 3.5 of 5 (1)
Mountain Hardwear Switch 35°
$120 MSRP
user rating: 3.5 of 5 (1)
Lafuma Extreme 800 LD
 
user rating: 3 of 5 (1)
Vango NiteLite 250
CRAZO Premium Hooded Envelope Sleeping Bag
$70 MSRP
 
user rating: 3 of 5 (1)
Cascade Designs Synergy 40
user rating: 2.5 of 5 (3)
REI Travel Sack +55
 
user rating: 2 of 5 (1)
Europe Bound Europe III
user rating: 2 of 5 (1)
Outbound Lite Sleeping Bag -3°C
 
user rating: 2 of 5 (7)
Ozark Trail Sleeping Bag
$16 MSRP
user rating: 5 of 5 (4)
Marmot Trails
discontinued
user rating: 5 of 5 (2)
Lafuma Patrol Light
discontinued
user rating: 4.5 of 5 (4)
Mountain Hardwear X-Country 40
discontinued
 
user rating: 4.5 of 5 (4)
The North Face Tourlight 3D
discontinued
user rating: 4.5 of 5 (4)
The North Face Wasatch 40
$69 MSRP
discontinued
user rating: 4.5 of 5 (3)
Lafuma Extreme 600
discontinued
user rating: 4.5 of 5 (2)
Kelty Cosmic 50 (synthetic)
discontinued
user rating: 4.5 of 5 (2)
The North Face Equinox
discontinued
user rating: 5 of 5 (1)
MontBell Super Stretch Burrow Bag #7
discontinued