Coleman – Big Bay Sleeping Bag 20 Mummy Moss C001. INSULATED BODY: Coletherm MAX Insulation provides superior heat retention in temperatures as low as 20F, semi-sculpted hood helps lock in heat. FOOT VENTILATION: J-zipper lets you air out footbox on warmer nights. COMPRESSIBLE STUFF SACK: Makes it easy to quickly pack up and store sleeping bag. HEAT RETENTION: Thermolock draft tube prevents heat loss through the zipper. EASY ZIP: ZipPlow patented zipper design prevents snags so bag is easy to open and close. You’re already purchasing the item. With our dynamic pricing model, our prices are always competitive. Our prices are some of the lowest that you will find on the internet. Rest assured that you’re getting a good deal when purchasing with us.