Coleman Big Bay 20 Mummy Sleeping Bag 5% Open firewood and other heavy loads A4571 firewood and other heavy loads a proprietary fill process and they are 100% fogproof and waterproof Coletherm MAX Insulation provides superior heat retention in temperatures as low as 20°F semi sculpted hood helps lock in heat J zipper for ventilating footbox on warmer nights Sleeping bag packs into compressible stuff sack Thermolock draft tube prevents heat loss through the zipper ZipPlow patented zipper design prevents snags so bag is easy to open and close Cozy Foot soft fleece footbox and Comfort Cuff material for softness and protection around the face Dimensions are 32 x 79 in