KEEPS YOU WARM: Stay warm in temperatures as low as 40°F COMPACT: Coletherm Max premium and lightweight fill provides better heat retention with less weight, allows bag to pack into compressible stuff sack with side straps for cinching; packs smaller than traditional Coleman bags PREVENTS HEAT LOSS: Thermolock draft tube prevents heat loss through the zipper NO-SNAG ZIPPER: ZipPlow​ patented zipper for snag-free opening and closing COMFORT CUFF: Patented design provides soft protection and comfort around face Zip two together for double the room