Curl up and sleep easy with the Kelty Cosmic 20 Sleeping Bag
What Our Gearhead® Experts Are Saying:
“I took the Cosmic 20 on a week-long trip through the Uintas last September, and the trapezoidal baffle construction made a real difference on those sub-freezing nights near the pass. The expanded footbox gave my feet room to breathe, which sounds like a small thing until you’ve spent a night in a bag that cramps them.”
Cold nights in the backcountry have a way of sorting out the gear that earns its spot in your pack and the gear that gets left behind. The Kelty Cosmic 20 Sleeping Bag has been earning that spot for years, and there’s a reason it remains one of our most trusted three-season companions. From high-country campsites in late October to shoulder-season basecamp setups where temps drop fast after dark, this bag delivers the warmth you need without piling on the weight.
The Cosmic 20 is built around 550-fill down insulation with a trapezoidal baffle construction that traps heat efficiently, keeping you comfortable when the mercury slides toward the 20-degree mark. The expanded natural-fit footbox gives your feet real room to move, a feature that makes a much bigger difference over a long trip than it sounds. A full draft tube and collar lock in warmth at the critical points, while the dual locking zipper sliders let you vent when the night warms up. The fully recycled shell and liner fabrics with PFAS-free DWR round out a bag that performs well and travels lighter on your conscience too.
Details
- Three-season down bag rated to 20°F for cold nights out
- 550-fill down in trapezoidal baffles locks in warmth
- Expanded footbox gives feet room to move all night
- Full draft tube and collar keep heat where it belongs
- Dual locking sliders let you vent when temps climb
- Zippered internal pocket keeps small essentials close
- Fully recycled shell and liner with PFAS-free DWR
- Stuff sack included for quick and easy pack-up
- Item #KELO09T
- Material
- [shell] 20D 400T nylon, PFC-free C0 DWR finish [liner] 50D 300T polyester
- Insulation
- 550-fill duck down
- Shape
- mummy
- Zipper
- full-length
- Max User Height
- fits to 5ft 8in
- Shoulder Circumference
- [regular] 57in
- Hip Circumference
- [regular] 52in
- Foot Circumference
- [regular] 40in
- Bag Length
- 5ft 8in
- Draft Tube
- anti-snag zipper draft tube
- Pockets
- 1 internal stash pocket
- Pad Retainer
- none
- Venting
- dual slider for ventilation
- Fill Weight
- 1lb 4.7oz
- Degree
- 20°F
- European Norm/ISO Comfort Rating
- 29.7F
- European Norm/ISO Lower Limit Rating
- 18.7F
- Stuff Sack
- included
- Stuff Size
- 13 x 8in
- Claimed Weight
- 3lb 15oz
- Activity
- backpacking, weekend camping
- Manufacturer Warranty
- limited lifetime





























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