Hooded Vapor Barrier Liner
Sleeping Bag Liner
Designed to keep a down sleeping bag dry on multi-day trips by preventing body perspiration (up to half a cup a night) from getting trapped in the down, the HVBL can enhance a sleeping system in a number of ways. It reduces dehydration by lowering an individual's perspiration rate once skin senses that it is in a humid environment. It adds warmth to a sleeping bag by trapping an extra air layer and reducing evaporated heat loss (up to 5 degrees). It also serves as an emergency bivy when out on a extended day trip or climb. The HVBL is made from ultra-light Silcoat nylon, has a contoured hood with a draw-string and cordlock to fully contain moisture and reduce liner slippage and has a large foot box ensuring a non-constricting fit.