The Three Wire Hooped Bivy is an ultralight, four-season shelter designed for mountaineering and fast solo travel. It features a single DAC aluminum hoop for headroom and structure, a waterproof HyperBead™ floor, and Pertex® Shield upper for weather resistance. The top third unzips wide for easy entry, and the bathtub-style floor protects against rough terrain. Dual window closures provide ventilation or full storm protection. It packs down small and weighs 19 oz, ideal for alpine starts and emergency bivy use.