Kelty Cosmic 20 Down Sleeping Bag

-6°C Comfort Limit, 464g of 550 Fill Power Down
Weighs 1148g (Regular bag)
Code: SS21655V
  • Now £128.99
  • (FREE UK & EU Delivery)
+ In Stock Now | Usually dispatched within 24 hours

The Cosmic range of bags are an excellent entry level down sleeping bag option. When durability, warmth and value are prioritised over weight and pack size the Cosmic is a great choice of bag. 

Kelty says:

Remember the trapezoid from 10th-grade geometry? Turns out, this funky ol’ shape is ideal for helping sleeping bag baffles retain heat. The trapezoidal baffle construction improves on our best-selling Cosmic 20 sleeping bag—and it’s just one of the reasons the Kelty Cosmic Down 20 is still our favorite three-season superstar. We also love the natural-fit foot box for happier feet, and a PFC-free water-repellent coating for a healthier environment.

Kelty's Cosmic 20 Down Sleeping Bag provides a good amount of warmth and comfort. The bag uses trapezoidal baffles to allow the down to loft more and trap more heat. Using 464g of 550FP down you are getting a massive amount of insulation which is reflected in the -6°C Comfort Limit. It has all the features you'd expect from a top of the range bag with a draft tube down the anti-snag zipper, shoulder baffles and a close fitting hood. 

For the set of features and level of warmth at this price there are some other costs and these come in the weight of the bag and it's pack size. The Cosmic range definitely provides excellent value for money as long as you are fine with the heavier weight and larger pack size compared to more expensive alternatives. It is certainly a perfect piece of kit for car camping in particularly cold conditions.

- Reviewed by BasecampGear

Help and advice:
  • Innovative trapezoidal baffle construction = thermal efficiency
  • Lightweight and warm 550 fill down
  • Environmental and health friendly C0 and PFC-free DWR fabrics
  • Zippered internal stash pocket for headlamp, cell phone or actual… stash
  • Buttery-soft and durable 20D Nylon shell fabric
  • Zipper draft tube with anti-snag zipper design makes it easy to get in and out
  • Dual slider for ventilation with locking zippers
  • Natural fit spacious footbox = more room to wiggle your toes
  • Comes with stuff sack for quick departures

Temperature Rating

  • Temperature Rating: 20°F / -7°C
  • ISO Comfort Temp Rating: 32°F / 0°C
  • ISO Limit Temp Rating: 21°F / -6°C
  • ISO Extreme Rating: -11°F / -24°C

Short Specs

  • Weight: TBC
  • Fill Weight: 14.64 oz / 415g
  • Fits Up To: 5'6" / 167 cm
  • Stuff Sack Size (L x W): 7 x 13 in / 18 x 33 cm

Regular Specs

  • Weight: 1148g (excludes storage bags)
  • Fill Weight: 16.37 oz / 464g
  • Fits Up To: 6'0" / 183 cm
  • Stuff Sack Size (L x W): 8 x 13 in / 20 x 33 cm

Long Specs

  • Weight: 1292g (excludes storage bags)
  • Fill Weight: 18.8 oz / 533g
  • Fits Up To: 6'6" / 198 cm
  • Stuff Sack Size (L x W): 8 x 14 in / 20 x 36 cm


  • Insulation: 550 Fill Power Duck Down
  • Shell Fabric: 20D 400T Nylon
  • Liner Fabric: 50D 300T Polyester
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