Hypothermia is not a joke, and neither is frost bite. Prevent the possibility with this emergency bag. You can put in you old sleeping bag to keep the heat from escaping in the dead of winter, or just pack it in your pack in case of an unexpected weather turn. Coghlans is giving you the survival tools you&';ll need in the outdoors, so take them, because being prepared is always better then getting the unexpected. Provides shelter against wind and rain Retains body heat Prevents or treats hypothermia Size: 84" x 36" (213 cm x 91.5 cm) Weight: 2.6 oz. (74 g)