Kelty Cosmic 40 Synthetic Sleeping Bag

-3°C Comfort Limit, 680g of CirroLoft Synthetic Insulation
Weighs 1118g (Regular bag)
Code: SS21661V
  • Now From £69.99
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The Cosmic Synthetic range provide great value for such warm sleeping bags. A generous amount of insulation, full set of features and impressively low cost.

Kelty says:

Let’s face it- when is backpacking ever actually easy? While we can’t take the pain out of your elevation gain, we CAN put you on the trail with the new Cosmic Synthetic 40 Sleeping Bag. It’s a fully equipped mummy bag that’s light on weight and your wallet. The Cosmic synthetic is a three-season superstar built with our new CirroLoft synthetic insulation for lightweight, compressible warmth. Soft-as-silk nylon taffeta fabric means you’ll be thinking less about weary hiker feet and daydreaming about more QT in the outdoors.

Kelty's Cosmic 40 Synthetic Sleeping Bag uses a generous 680g of CirroLoft synthetic insulation to deliver a warm bag that has a -3°C Comfort Limit. Although the synthetic Cosmic range are not the lightest bags you certainly get extraordinary value for money. 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 good hood.

For the set of features and level of warmth at this price there are some other costs and these come in the form of a high weight and rather large pack size. For this amount of money you would expect some trade offs but when you consider just how warm and comfortable the bag is at this price it's hard to complain about the size and weight. It is an ideal piece of kit for car camping in particularly cold damp conditions.

- Reviewed by BasecampGear

Help and advice:
  • Environmental & health friendly PFC-Free DWR
  • New CirroLoft synthetic insulation
  • Natural-fit spacious footbox = more room to wiggle your toes
  • Handy stash pocket for your headlamp/cell phone/actual stash
  • Buttery-soft and durable nylon shell
  • Compression stuff sack included

Temperature Rating

  • Temperature Rating: 40°F / 4°C
  • ISO Comfort Temp Rating: 37°F / 3°C
  • ISO Limit Temp Rating: 27°F / -3°C

Regular Specs

  • Weight: 1118g (excludes storage bags)
  • Fill Weight: 24 oz / 680g
  • Fits Up To: 6' / 183 cm
  • Length: 78 in / 198 cm
  • Shoulder width: 31 in / 78.5 cm
  • Stuff Sack Size (L x W): 15 x 8.5 in / 38 x 22cm

Long Specs

  • Weight: 1196g (excludes storage bags)
  • Fill Weight: 26.5 oz / 750g
  • Fits Up To: 6'6" / 198 cm
  • Length: 84 in / 213 cm
  • Shoulder width: 32 in / 81 cm
  • Stuff Sack Size (L x W): 15 x 8.5 in / 38 x 22cm


  • Insulation: CirroLoft
  • Shell Fabric: 380T Nylon Taffeta
  • Liner Fabric: 50D 300T Poly Taffeta
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