Over the years, the Black Diamond Big Wall Hooped Bivy has become a favorite for alpine and big wall climbers throughout the world. This minimalist shelter is designed for harsh environments and technical climbs. The wire reinforcement in the hood cuts down on claustrophobia, while the Todd-Tex fabric keeps you dry. Climbers love the Big Wall Hooped Bivy for its full-strength tie-in point, which allows you to stay clipped in and sealed off at the same time.