Big Agnes Farwell 0 Degree Sleeping Bag Flow Construction: Insotect Tubic is a revolutionary tubular insulation system engineered to provide the maximum cubic loft for supreme thermal efficiency and user comfort. Integrated full pad sleeve. Never roll off your pad again. Rectangular shape offers more room in foot box and shoudlers Mesh storage sack and nylon stuff sack included Shell: Nylon rip-stop w/ water resistant treatment. Lining: Soft, breathable nylon taffeta. Pad Sleeve: Nylon rip-stop w/ water resistant treatment. Fill: INTEGRITY synthetic insulation with 97% recycled content. Pad size: 20" x 78". Bag Weight: 4lb 8oz. Shoulder Girth: 73". Hip Girth: 69". Foot Girth: 55".