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Kelty® Cosmic Down 40° Sleeping Bag

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Sale price $124.99

Leaves our warehouse in 2 business days.

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Okay, it's not a popularity contest…but if it was, this sleeping bag would definitely win! Kelty calls this an OUTDOOR SUPERSTAR and for good reason. This bag contains 550 fill down in a durable and super-soft nylon cocoon that’s so cozy, you won’t want to leave it.

The Kelty Cosmic Down 40° Sleeping Bag has received positive reviews from outdoor gear experts and consumers alike for its lightweight and packable design, as well as its use of DriDown insulation, which is hydrophobic and dries quickly, providing warmth even in damp conditions.

The Cosmic Down 40° has also won several awards and accolades in the outdoor gear industry, including a 2019 Backpacker Magazine Editors' Choice Award. It was also included in Outside Magazine's 2019 Buyer's Guide as one of the best sleeping bags for summer backpacking.

Features of this best seller include an internal stash pocket to keep important items close at hand and quilt-through construction for thermal efficiency. The Cosmic Down 40° mummy bag also has a dual slider, anti-snag zipper and a footbox big enough so your feet can move around.

Feel free to melt inside this buttery-soft nylon shell! It’s both water repellent and environmentally-friendly with Kelty using C0 and PFC-free DWR fabrics. In addition, all Kelty down is 100% ethically sourced from Allied Feather & Down and can even be tracked to see where it came from!

Choosing an environmentally-friendly product from an ethically-responsible name like Kelty will make you feel as good on the inside as it does on the outside! You really can't go wrong with the Kelty Cosmic Down 40° Sleeping bag.


  • Material: 20D 400T Nylon
  • 40° Mummy Regular Size Sleeping Bag
  • 20D Nylon Shell Fabric
  • Liner Material: 50D 300T Polyester
  • Fill: 550FP Duck Down
  • Quilt-Through Construction for Thermal Efficiency
  • Environmental and Health Friendly C0 and PFC-free DWR Fabrics
  • Zippered Internal Stash Pocket for Headlamp, Lip Balm, Etc.
  • Zipper Draft Tube with Anti-Snag Zipper
  • Dual Slider for Ventilation with Locking Zippers
  • Natural Fit Spacious Footbox
  • Comes with Stuff Sack for Quick Departures
  • Fits up to 6'
  • Weight: 1lb 12oz
  • Fill Weight: 9.14oz
  • Stuff Sack Size: 7" x 10"
  • Length: 78”
  • Shoulder Circumference: 62”
  • Hip Circumference: 58”
  • Foot Circumference: 40”

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