Genuine US Military Issue Improved Wet Weather ACU Parker, NEW W/Tags or NEW Issued The IWW rain set is made of a lightweight breathable, waterproof material ,it is a nylon material that is pliable and moisture-vapor semi-permeable. Like Gore-tex, the material resists external water while allowing perspiration or other moisture to transfer from inside to outside, thereby keeping the wearer dry and comfortable. The Parka/Jacket of the Improved Rain Suit has a roll-up hood with a visor and drawstring closure. There are armpit zippers for ventilation, a heavy duty full-length zipper in front covered by a storm flap that closes with snaps. The pockets are pass through to inner garments. The elbows are reinforced and Velcro closures at the cuffs make a tight fit. The jacket has interior buttons to match the M65 Field Jacket liner for added warmth.