The Tex Sport Caprock Sleeping Bag will keep you warm and comfortable to 40F. Its 35 pounds of Insublok polyester insulation and a quilted through construction to keep it in place avoiding cold spots. The outer is O. D. polyester and the liner a comfy polyester/cotton making it washable so you can keep this bag clean even on extended travels. The two-way zipper allows for extra ventilation at the feet during warmer nights. It comes with two easy elastic roll up straps and a poly bag for easy storage. It's a great sleeping bag for backpackers, sleep-overs, camping trips, festivals and shorter trips into the wild in places that don't get very cold at night.