Cocoon Ripstop Nylon Vapor Barrier Mummy Bivibag Black 210 x 80-55 cm

COCOON Ripstop Nylon Vapor Barrier Mummy Bivibag/Liner: Your Ultimate Cold Weather Survival ToolConquer the coldest environments and maximize your sleep system´s efficiency with the COCOON Ripstop Nylon Vapor Barrier Mummy Liner. This highly technical piece of gear is a game-changer for winter expeditions, high-altitude mountaineering, and any adventure where sub-zero temperatures are a serious challenge. Functioning as both a performance-enhancing liner and an ultralight emergency bivy sack, it is an essential addition to the kit of any serious cold-weather enthusiast. The Science of Staying Warm in Extreme ColdThe primary function of this vapor barrier liner (VBL) is to drastically reduce evaporative heat loss, one of the most significant ways your body gets cold during the night. The COCOON Vapor Barrier Liner surrounds your body with an ultralight, 100% non-breathable 15 Denier Ripstop Nylon shell that is laminated with a waterproof TPU-film on the inside. This impermeable layer pr