BIG SKY Insulite Cozy Insulated Bag - Single Almost unused. ※ From the sales page: This is an ultra-lightweight, high-performance cozy (insulation bag). PrimaLoft is used for the padding, and an aluminum film is used for the surface fabric to enhance heat retention. It's large enough to fit a Lotus "aluminum pot" and can be used for various purposes. - As an insulation cozy for rehydrating freeze-dried food with hot water. - As a cooler bag for carrying cold beer to the mountains. - As a booster for insulated bottles.