The Trailhead Bivi can be used as a standalone sleeping bag cover?for lightweight mountain days or as extra protection under a tarp on backpacking or?bikepacking?trips. The lightweight waterproof construction keeps the worst of the elements off your sleeping bag, whilst an open face style and zipped mesh vent offers great ventilation to reduce condensation. Ideal for fast and light adventurers who find a zipped face?bivi?constricting, the Trailhead Bivi is 406g and packs down to just 18cm x 12cm. Stashable, simple and protective, its built for the hardy outdoor adventurer.