Outer: 320D nylon
Inner: 210T/C cotton
Filling: Spinning cotton
Extreme: Using sleeping bag at this temperature, there would be a phenomenon of hypothermia, even the threat of death. Extreme temperatures are belong to theoretical range, only be considered difficult to reach to dangerous critical point.
Comfort: Using sleeping bag at this temperature, we will have a good sleep all night.
Roomy all-weather mummy sleeping bag. Durable zipper, thick nylon taffeta shell, cotton lining, mummy-style hood. Includes stuff sack with oxford cloth compression straps. This well-built sleeping bag keeps you warm in all but the comfort temperatures. Cozy cotton lining feels like luxury bed sheets. Zipper and shoulder baffles keep drafts out of the openings. Dual layer construction with staggered seams distribute fill evenly to reduce compression and eliminate chilly spots. Mummy style hood snugs around neck with drawstring. No-snag, self-repairing zipper opens top or bottom for adjustable ventilation and connects easily to second bag for shared sleeping space.