The Men's Adrenaline 20° Sleeping Bagby GoLiteis a premium 800-fill goose down, 20° sleeping bag that offers superior warmth, unmatched comfort and versatility, coupled with lite-weight construction and a male-specific fit. The waterproof Pertex® Endurance Arid Zones™ at the head and foot of the bag protect against condensation in critical areas. A trimmer mummy shape offers a closer fit with warmth efficiency and the half-length top zip provides the most efficient core temperature regulation.