he Hunter Ultima Thule with Hood bag is a 0° F (approximately -20° C) rated rectangular style bag. The size of the bag is 36 inches wide and 92 inches long (weight ~6 lbs). When combined with the Nautilus Overbag with Hood, the Super Light FTRSS is rated at -40° F.
This bag also comes with a choice of three zippers; all zippers are made from a #10 YKK molded tooth zipper. When mated, the bags can then be used for couples camping, or if in an emergency situation, for shared body heat.