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Cosmic Sleeping Bag: 0F Synthetic

5 out of 5 stars
1 Review
Current price: $84.47 Original price: $129.95
35% off
Color:Fired Brick/Smoke



Why We Like the Cosmic Sleeping Bag: 0F Synthetic

At the intersection of lightweight and warm, we found Kelty's Cosmic Sleeping Bag (0°F Synthetic) to give us toasty, comfy slumbers on chilly nights out in the backcountry while also packing down small to take up less room in our pack. The new insulation captures warm air and reflects our body heat back to us, so we wake up completely rejuvenated and ready to cover more trail miles.


  • Toasty sleeping bag for your chilliest shoulder-season treks
  • Kelty's CirroLoft insulation offers lightweight, compressible warmth
  • Water-resistant finish is a barrier against light precipitation
  • Spacious footbox gives your toes extra room to wiggle
  • Internal pocket stashes your headlamp, lip balm, and phone
  • Item #KELO09C
[shell] 380T nylon taffeta, PFC-free DWR finish [liner] 50D 300T polyester taffeta
CirroLoft (siliconized microfibers)
Max User Height
[regular] up to 6ft [long] up to 6ft 6in
Shoulder Circumference
[regular] 31in [long] 32in
Hip Circumference
Foot Circumference
Bag Length
[regular] 6ft 6in [long] 7ft
Draft Tube
zipper draft tube
1 internal stash pocket
Pad Retainer
Fill Weight
[regular] 3lb 7oz [long] 3lb 12oz
European Norm/ISO Comfort Rating
European Norm/ISO Lower Limit Rating
Stuff Sack
compression, included
Stuff Size
17 x 11in
Claimed Weight
[regular] 4lb 6oz [long] 4lb 11oz
Manufacturer Warranty
limited lifetime

Overall Rating

5 based on 1 ratings

Review Summary

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5 Stars - 1 reviews

Fits True To Size

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5 out of 5 stars

August 20, 2023

Warm (at least around 30F)

I've used it several times

I have only used this at temps around freezing (lower 30s) and along with a proper sleeping pad (pad reads an R 5 rating). It kept me warm and happy. It's roomy. Using one compression sack I could fit this in my 75 litters backpack. The zipper never get stuck. There's a flapper that seats nicely on ur neck and traps the heat inside the bag. The hat (or head part of the bag) can be adjusted to cover the head nicely. I haven't tested this around It's comfort temp but I'd definitely recommend this for temps around 30F.

Mehdi K