US Army Aircorps Insulated Flight PantsAlso called "Arctic Survival Pants" this is one toasty pair of britches. Lined with wool inner lining ,fury in texture the outer cloth is heavy duty cotton duck. Two cargo pockets and two slash pockets,button suspenders. The zip ankle enclosure allows you to slip them on over boots. These are commonly worn by both flight crews and ground crews in unpressurized aircraft in cold conditions.