Kelty  Cosmic 20 Sleeping Bag - Women's

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Sleep comfortably through chilly nights in the women's Kelty Cosmic 20 sleeping bag. With thermally efficient trapezoidal baffle construction and 550-fill-power down, it's a 3-season superstar.


  • Trapezoidal baffle construction promotes heat retention and thermal efficiency; 550-fill-power down insulation is warm and quick-drying
  • 20-denier nylon taffeta outer shell is durable, yet buttery soft; 50-denier polyester taffeta lining is ultrasmooth on your skin
  • C0 and PFC-free durable water repellent (DWR) coating helps repel moisture to keep you warm and dry inside
  • Internal zippered stash pocket provides a convenient place to stash your headlamp, phone or other camping needs
  • Dual-sliding, locking antisnag zipper makes it easy to get in and out and won't get stuck when you make ventilation adjustments
  • Draft collar and hood help keep the hot air in and cold air out
  • Spacious, natural-fit foot box allows more wiggle room for your toes
  • Includes stuff sack


Temperature ratings are intended as a guideline to help you compare products, rather than a guarantee of warmth, since many different factors contribute to your comfort while you sleep. Backpacking bags are typically rated for temperature according to an independent testing protocol—currently International Organization for Standardization (ISO) 23537, though some older items followed European Norm (EN) 13537. Testing is based on a person wearing one base layer and a pair of socks, sleeping on an insulated surface with a minimum R-value of 5.38.

Each bag then gets 2 ratings: the Comfort rating is the lowest temperature at which the bag will keep the average "cold sleeper" comfortable, and the Lower Limit rating is the lowest temperature at which the bag will keep the average "warm sleeper" comfortable. Some brands determine their own temperature rating by aligning to the Comfort rating for women’s bags, to the Lower Limit rating for men’s bags, or somewhere in the middle for nongendered bags.
View the Kelty Cosmic Product LineView all Kelty Backpacking Sleeping Bags

Technical Specs

Item #187509
Best Use


Tested Lower Limit

13 degrees (F) - ISO

Tested Comfort

25 degrees (F) - ISO

Temperature Rating (F)

25 degrees (F)

Temperature Rating (C)

-4 degrees (C)


3 lbs. 7 oz.


20-denier nylon

Zipper Location


Insulation Type


Water-Resistant Down



550-fill-power duck down

Fill Weight

1 lb. 14.6 oz.


50-denier polyester

Sleeping Bag Shape


Fits Up To (in.)

68 inches

Shoulder Girth (in.)

57.8 inches

Hip Girth (in.)

57.9 inches

Stuff Sack Size

13 x 8 inches



17 reviews with an average rating of 4.5 out of 5 stars

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