Antarctic Sleeping Bags (-30 rated) Expedition Sleeping Bags, Rated to -30F, Slumberjack, Eddie Bauer, Expedition Outfitters, Caribou Mountaineering, and others. Various Sizes, the largest being 92"x40", Synthetic Fill, Weight between 8 and 12 pounds. Mostly Mummy Bags, but there are a few Rectangular Ones, as well.