DESC: The Coleman(r) Hibernation(tm) 40-degree double sleeping bag is designed to keep 2 people warm and comfortable with 6-lbs of DuPont(r) Hollofil(r) 808 insulation and a cotton flannel liner. A Comfort Cuff(tm) surrounds your face with softness and a Thermlock(tm) feature reduces heat loss through the zipper, keeping you warmer.