Federal Prison Industries (UNICOR) manufactured official ECWCS (Extended Cold Weather Clothing System) waterproof overtrousers for the U.S. military utilizing laminated nylon with PTFE (Gore-Tex) membranes and interior GORE-SEAM tape. Overview & SpecificationsItem Name: Trousers, Extended Cold Weather, CamouflageManufacturer: Federal Prison Industries (such as facilities in Manchester, KY or Fort Dix, NJ) Material: Waterproof, windproof, and breathable nylon outer shell with polytetrafluoroethylene (PTFE) laminate and fully sealed GORE-SEAM interior tapePatterns: Commonly found in 3-color Desert Camouflage (DCU) and Woodland CamouflageDesign: Relaxed overpant fit engineered to layer over standard uniform trousers, featuring pass-through pocket openings, elastic drawcord waist, snap fly, and lower leg side zippers with hook-and-loop cuffs