Cosmic 40

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When the trail is beckoning, you’ll be well prepared with the lightweight Cosmic down 40°F sleeping bag. Newly restyled for 2016 with 600-fill hydrophobic DriDown™, this bag ensures comfort in warmer weather adventures and dryness thanks to revolutionary down that resists water and condensation. With features like quilt-through construction and a rugged down proof polyester ripstop shell, it’s hard not to experience more joy every night.


  • 50D polyester taffeta liner
  • 50D Down Proof Polyester Ripstop shell
  • 600 fill power DriDown™
  • 60 in. dual-slider, locking zipper
  • FatMan and Ribbon™ drawcords
  • Draft collar
  • Quilt through construction
  • Stuff sack included
  • Thermal-comfort hood and natural fit footbox
  • Zipper draft tube with antisnag design


Temp Rating: 40° / 4°C

EN Lower Limit Rating: 40° F / 4° C

Size Regular:
  • Fits to: 6 ft / 183 cm                                   
  • Fill weight: 12 oz. / .34 kg
  • Total weight: 1 lb 12 oz / .794 kg
  • Stuffed size: 7 x 12 in / 18 x 30 cm
Size Long:
  • Fits to: 6 ft 6 in / 198 cm
  • Fill weight: 13 oz. / .369 kg
  • Total weight: 2.09 lb / 950 g
  • Stuffed size: 7 x 12 in / 18 x 30 cm


600 fill power DriDown™

Shell material:
50D Polyester Ripstop

Liner material:
50D Polyester Taffeta
New Badge: Yes
Gender: Unisex
Insulation: DriDown
Temperature Rating: 25 - 40 Degree
Mountain Sports:
Backcountry Edge:
Gander Mountain:
    • Kelty Cosmic DriDown 0 20 40

    Cosmic 40 In Action

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    Product Reviews


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    1. Great for travel

      I really love this sleeping bag. It's very lightweight and small, fits perfectly on the straps of my pack. That being said, there isn't much cushion or padding to lay on but if you have a mat or don't mind hard ground you'll be satisfied. It's kept me warm but not too hot in 40-60 degree weather. Have yet to use it on colder weather, and with 70s it gets a little warm but not bad. A little more roomy than a mummy but still compact. I would definitely recommend this sleeping bag. on May 28th 2016

    2. Pack size perfect

      I originally thought I would only use the cosmic 40 in warm weather. Well I just returned from an overnight hike /fishing trip the day time temp was 70but overnight it dropped to about 35. I stayed warm and cozy in the bag but I would not risk any colder. Very well constructed zipper /draw cord work flawless. Packs down very small on Apr 21st 2016

    3. Warm at 10,000 feet

      I took this bag into the back country on a fly-fishing trip at 10,000 feet in July. After a day of fishing I got back to camp and it was cold... to cold for July. I was worried I would be cold all night. I crawled into this bag and slept the whole night. Not once did I roll over to think about adding a layer in the middle of the night. My buddy on the other hand wouldn't stop complaining the next day about how cold he was the night before. This bag also packs down into the size of a fruit roll-up. on Mar 24th 2016

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