Cosmic Synthetic 40

Enjoy the outdoors in the Kelty Cosmic Synthetic 40 Sleeping Bag. Kelty makes it easy to hit the trail without overpacking or overspending. Designed for mild-weather adventures, this lightweight mummy bag features fully recycled materials and CirroLoft ECO insulation for compressible, cozy warmth. A soft-touch 20D nylon shell with a PFAS-free DWR finish repels moisture, while the roomy natural-fit footbox and contoured hood keep comfort front and center. With thoughtful features like a zippered stash pocket and snag-resistant dual sliders, the Cosmic 40 is built to deliver reliable rest under the stars—spring, summer, and early fall.

• CirroLoft ECO synthetic insulation made from 100% recycled fibers
  
• Lightweight and compressible warmth 
  
• Three-season sleeping bag
  
• Soft 20D recycled nylon taffeta shell with PFAS-free DWR
  
• Offset quilt construction reduces cold spots
  
• Natural-fit footbox for extra wiggle room
  
• Zippered internal stash pocket
  
• Full-length draft tube with dual locking sliders and anti-snag treatment
  
• Contoured hood with insulated upper tube for comfort and warmth
  
• Compression stuff sack included
  
• Shell Material: Recycled 20D Nylon Taffeta
  
• ISO Comfort Rating: 37°F / 5°C
  
• ISO Limit Rating: 27°F
• Fits to: 6'0" / 183 cm
  
• Length: 76" / 193 cm
  
• Shoulder Width: 31" / 78.5 cm
  
• Fill Weight: 21.1 oz
  
• Total Weight: 2 lbs 4 oz
  
• Stuffed Size: 17" x 8" / 43.2 x 20.3 cm