The Propper A2CU Flight Suit Trousers as part of your OCP flight suit are authentic, military approved Army Aircrew Combat Uniform pants made from a flame resistant ripstop material. The material is a 35% nylon / 35% cotton / 30% aramid blend that meets mil-spec GL/PD 07-12 standards and is NIR compliant. These Army and Air Force flight suit pants feature a zipper fly with button closure for added comfort and protection, adjustable side waist tabs, and adjustable leg opening tabs. Being part of a military flight suit requires plenty of storage space for your mission necessities, and these trousers provide just that. Pockets include two front hand pockets with hook & loop closure, two cargo pockets at the thighs with zipper closure, two zippered calf pockets with hook & loop closure, and a reinforced knife pocket on your left inseam.