Improved 1.5 oz lighter and 30% stronger. An ideal survival/emergency bag for day hikes, summit attempts, cross country skiing, snowmobiling and more. Thermo-Lite® 2 on the bottom of the bag and the original Therm-Lite® on the top. Lasts longer, withstands rocky ground and hard snow pack conditions. Easily repaired in the field with duct tape. Design allows you to open side, bottom, and top for moisture and heat to escape. Close all openings to keep body heat inside. Reusable. Packed in a bright orange & blue carrying sack.