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Sea to Summit Traverse XT II Sleeping Bag

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With a temperature rating of 12°F, this versatile Sea to Summit Traverse Xt II down sleeping bag keeps your nights warm when trekking the Himalayas or hut to hut touring the Alps.

  • 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


Item 830940


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Sea to Summit Traverse XT II Sleeping Bag Specs
Best use
12 degrees Fahrenheit
23 degrees Fahrenheit
12 degrees Fahrenheit
-11 degrees Celsius
2 lbs. 15 oz.
1.2 / 1.3 kilograms
850-fill goose down
20 ounces
72 / 78 inches
59 inches
54 inches
8 x 18 inches
15 liter
EN lower limit (rating for men)
EN comfort (rating for women)
Temperature rating (F)
Temperature rating (C)
Weight - metric
Insulation type
Fill weight
Sleeping bag shape
Fits up to (in.)
Shoulder girth (in.)
Hip girth (in.)
Stuff sack size
Stuff sack volume

Sea to Summit Traverse XT II Sleeping Bag

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Sea to Summit Traverse XT II Sleeping Bagis rated4.0out of5by1.
Rated4out of5byfromQuality bagThis is a quality bag. Beware of the size. A regular will feel tight and short if you are over 5'10"and athletic build. ( I'm about 175 lbs. ) Not any room for layering if you go much colder than rated or sleep cold. The footbox is made for small least in the Regular size. Laying on my back, my toes are pressing the top of the loft. Have not found it to be an issue yet but I've only had it out in temps in the mid thirties.
Date published: 2013-03-24

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