FlyLite 36°F by Western Mountaineering


Size: 5'6"
$ 485


Ships in 1-2 business days | Based in San Jose, CA | Est. 1970

The lightest weight down sleeping bag that is fully baffled. Summertime perfection!

Western Mountaineering designed their FlyLite down sleeping bag as a product to celebrate their 50 year commitment to manufacture the lightest, most compressible sleeping bags in the world. They feel that this sleeping bag is a product to show the global lightweight gear community (triple crown thru hikers, trail runners, bike packers, and friends with cool names like “Psycho Haiko”) that they have been listening and taking feedback into consideration. This effort has resulted in the world's lightest weight down sleeping bag that is fully baffled (i.e. no quilted/sewn through construction). 

The tiny micro baffles create just enough separation between the lining material and the outer shell fabric to eliminate cold spots. 10 denier fabric lining and 10 denier nylon taffeta shell fabric with C-zero DWR with the finest polish 850+ goose down and a super light #3 YKK half zipper all contribute to the impressive specifications and performance. This bag weighs just over 14 ounces ounces/400 grams in the regular length and packs down to the size of a Nalgene bottle. Lower limit rating of 36 F/ 2C. 


  • Amazingly light and compressible
  • Fully baffled construction
  • Insulated top collar
  • Insulated draft tube
  • No sewn-through seams = no cold spots
  • 10 denier nylon shell fabric and lining
  • Lightweight half length #3 coil zipper
  • Made in USA


  • Stuff sack
  • Storage sack



  • Temperature rating: 20°F
  • Loft: 3.75" (total, both sides)
  • Packed size: 5" x 10" 


  • Fits individuals:  ≤ 5'6"
  • Inside girth (Shoulder | Hip | Foot): 59" | 51" | 39"

Weight: 13.5oz (total), 7.15oz (fill weight)


  • Fits individuals: up to 6'
  • Inside girth (Shoulder | Hip | Foot): 59" | 51" | 39"

Weight: 14.25oz (total), 7.65oz (fill weight)


  • Fits individuals: up to 6'6"
  • Inside girth (Shoulder | Hip | Foot): 60" | 52" | 39"

Weight: 14.75oz (total), 8.15oz (fill weight)


  • Fabric: 10D Nylon
  • Insulation: 850+ Fill Power Goose Down
  • Hardware: #3 YKK Zipper

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