Compare temperatures · 2026
3-season bags cover spring through fall in most US climates. Winter bags rated 0°F or colder for serious cold-weather camping and mountaineering. Summer bags and quilts are the lightest option for warm-night trips.
Temperature
20-32°F EN comfort. The most-used range.
Top pick
Kelty Cosmic 20 Down Mummy Sleeping Bag for Backpacking, Campers, 550 Fill Power, Recycled Fabrics with PFAS-Free DWR, Designed in Sunny Colorado,
Temperature
0°F EN comfort or colder. Mountaineering and serious winter use.
Top pick
Teton Celsius XXL Sleeping Bag, Cold Weather Sleeping Bags for Adults and Kids, Camping Made Easy and Warm. Compression Sack Included, 35F, 25F, 0F, 20F Degree
Temperature
40°F+ EN comfort. Summer bags and ultralight quilts.
Top pick
Kelty | Cosmic 40° Degree Sleeping Bag, Regular, 550 Down - Lightweight, Compact, Cozy, Warm Weather Bag - Summer
One pick per temperature. For the full top-5 inside any variant, use the cards above.
Sources behind this verdict
146 reviewers, weighted by source trust
Weighted by source trust
We don’t review products. We read what other reviewers wrote, score each source for trustworthiness, and synthesize the consensus.
How sources are scored →Trust hierarchy
Source mix
Trusted · 4 sources
Independent · documented methodologySupporting · 26 named sources
Across the reviewers we read, the Kelty Cosmic Down 20 is the default recommendation for a do-everything three-season bag at a non-painful price. CleverHiker's testing found the 550-fill down kept testers warm to around 30°F, and Backpackers.com calls it a solid value pick for the average backpacker.
Price
$107.48