Back to top


  • High loft, premium 850-fill-power goose down offers superb warmth for minimal weight
  • Shell fabric is constructed of a 20-denier ripstop fabric treated with a Durable Water Repellent and a non-woven silicone encapsulated fabric
  • Innovative shell manages condensation, moving moisture vapor through down and siliconized barrier outward; shell repels water and protects the loft of the bag
  • Lining is a breathable, durable 20-denier polyester fabric with a soft touch
  • Full-length side zipper and separate foot zipper allow bag to be converted from traditional sleeping bag to a duvet/down comforter
  • Relaxed mummy shape is cut with a large hood, broad shoulders and large chest for comfort and warmth
  • Upper side of bag is differentially cut so that the inner layer is smaller than the outer layer; this creates a consistent thickness of insulation and helps prevent cold spots
  • Lower side is cut in reverse so that the nner layer is larger than the outer layer; this allows down to loft up, filling spaces around body in warmth
  • Oversize draft tube backing zipper keeps the warmth in and the cold out; zipper is backed by stiff, antisnag tape for smooth operation
  • Interior zipper security pocket is great for stowing small essentials, alleviating middle-of-the-night fumbling and preserving battery performance in cold weather
  • Oversize collar drapes comfortably over neck and shoulders, sealing out drafts; dual elastic adjusters
  • Preventing cold air from seeping in, offset baffle construction allows the goose down to remain fully lofted and keeps it from shifting
  • Sea to Summit Traverse Xt I bag comes with a Ultra-Sil® compression sack, an oversize mesh storage cell and a large cotton sack
  • European Norm (EN) is an independent third-party temperature rating, allowing accurate comparisons across brands with other EN-rated bags


View all Sea to Summit Men's Sleeping Bags

REI membership


Best Use Backpacking
EN Lower Limit 12 degrees Fahrenheit
EN Comfort 23 degrees Fahrenheit
Temperature Rating (F) 12 degrees Fahrenheit
Temperature Rating (C) -11 degrees Celsius
Weight 2 lbs. 15 oz.
Shell Polyester
Insulation Type Down
Fill 850-fill goose down
Fill Weight 20 ounces
Lining Polyester
Sleeping Bag Shape Mummy
Fits Up To (in.) 72 / 78 inches
Shoulder Girth (in.) 59 inches
Hip Girth (in.) 54 inches
Stuff Sack Size 8 x 18 inches
Stuff Sack Volume 15 liter
Gender Unisex
Weight - Metric 1.2 / 1.3 kilograms
  • bvseo_sdk, java_sdk, bvseo-4.0.0
  • CLOUD, getReviews, 198ms
  • bvseo-msg: The resource to the URL or file is currently unavailable.;
  • bvseo_sdk, java_sdk, bvseo-4.0.0
  • CLOUD, getContent, 155ms
  • bvseo-msg: The resource to the URL or file is currently unavailable.;