Coleman Big Bay 20 Mummy Sleeping Bag Softshell Pants Soft finish and stretch panels 12 Nylon 2 Lycra Soft finish and stretch panels on the back and under the sleeves give you exceptional ease of movement and temperature regulation Fabric covered chains protect your bicycles paint from scratches and abrasions 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 Coletherm MAX Insulation provides superior heat retention in temperatures as low as 20°F