The Andes Infinium 800 Sleeping Bag is designed for freezing, high-altitude expeditions. It features a fully windproof breathable GORE-TEX INFINIUM WINDSTOPPER outer shell and a nylon backer with an ePTFE membrane for high moisture resistance. Ultralight 800-fill goose down is treated for moisture resistance. The face and neck baffle create a tight seal to prevent heat loss, while Flowgate technology maintains even warmth by preventing down movement. The GORE-TEX INFINIUM-lined neck limits breath accumulation. Its weight-efficient mummy cut includes an angled foot box for a relaxed posture.