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Regular price $269.95
Regular price Sale price $269.95
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The Kelty Women's Cosmic Ultra 20 is the ultimate in a lightweight mummy. We’ve taken our top-selling Cosmic Bag and added a women’s specific 800 fill DriDown version, with all the perks too. The new trapezoidal baffle construction improves is ideal for retaining heat—and it’s just one of the reasons Cosmic 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.

What makes it a women’s bag? It’s designed for and tested to women’s specific ISO standards. Studies show that women “sleep colder” than men. So, in addition to narrower shoulders, wider hips and a shorter torso, our women’s bags have extra insulation in the upper body and footbox.


  • Innovative trapezoidal baffle construction = thermal efficiency
  • Premium lightweight 800 fill DriDown
  • 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 and liner
  • Zipper draft tube keeps warm air in while anti-snag zipper makes it easy to get in and out
  • Natural fit spacious footbox = more room to wiggle your toes
  • Comes with stuff sack for quick departures


  • Liner: 20D 400T Nylon
  • Shell: 20D 400T Nylon
  • Fill: 800DP Dridown


  • Temperature Rating: 20.0°F / -7.0°C
  • ISO Comfort Rating: 25.0°F / -4.0°C
  • ISO Limit Rating: 13.0°F / -10.0°C
  • ISO Extreme Rating: -21.0°F / -30.0°C
  • Bag Shape: Mummy
  • Weight: 2.89 lbs / 1.31 kg
  • Fill Weight: 24.69 oz / 700.0 g
  • Fits To: 67.72" / 172.0 cm
  • Length: 74.02" / 188.0 cm
  • Shoulder Circumference: 57.87" / 147.0 cm
  • Hip Circumference: 57.87" / 147.0 cm
  • Foot Circumference: 38.19" / 97.0 cm
  • Stuff Sack Size: 8 x 13 in / 20 x 33 cm
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