A full-body bunker in the depths of winter, the Hyperdown 15 Sleeping Bag is the warmest sleeping bag Sitka have ever made. Best-in-class Allied Down 900-fill goose down sets the standard for warmth-to-weight and packability, while the ExpeDRY treatment provides synthetic-like performance in wet weather. The 15° bag is constructed to accommodate additional layers in your clothing system when the mercury plummets. Thoughtfully placed zippers free your arms to enable glassing or cooking and maximize time spent in warmth that you won’t want to leave behind. FEATURES: 15°F comfort rating Allied Down 900-fill for category leading warmth-to-weight ratio and packability Gold-infused ExpeDRY goose down boosts evaporation and offers synthetic-like performance in wet weather Zippered arm holes allow for free hands without leaving the warmth of the bag ⅘ length center zip provides the option to be worn standing up, or as added insulation while glassing Adjustable contoured hood shares design with Hyperdown Jacket 10D ripstop nylon shell and lining resist abrasion outside of the tent 2lb 3oz / 971g, Size Reg Size Reg fits up to 6ft or 72in Size Long fits up to 6ft 6in or 78in MPN: 600401