Propper's Foul Weather Trousers are made of 100% nylon with a GORE-TEX membrane. Waterproof, windproof and breathable GORE-TEX fabric makes this garment contamination-resistant to diesel fuel, jet fuel, DEET, petroleum, oils and lubricants. Features reinforced seat and knees, cargo pockets and pass-through pockets with VELCRO brand closures, and zippered leg openings for easy donning and doffing. Unlike the All (Foul) Weather Trouser I, this garment features a flap over the zippered leg opening and other construction reinforcements/enhancements. Features: GORE-TEX is ultralight, waterproof, windproof and highly breathable Made in USA Waterproof, even after repeat launderings, exposure to DEET, oil, and other types of petroleum Fade and shrink resistant Factory seam sealed for superior waterproof protection and insulation Drawstring waist for quick and secure fit Reinforced seat and knee Zipper fly with sturdy snap closure Two cargo pockets with Hook and loop closure Two pass-through front pockets Moisture-wicking barriers at leg openings Zippered leg openings Adjustable Hook and loop closure at leg openings