100 % polyester. M.O.L.L.E. backpack in 600D polyester with polyvinyl coating that makes it extra strong and durable. Ideal for outdoor activities, the backpack has water bladder pockets, hydration tube ports, a large admin front compartment, loop patches, M.O.L.L.E. webbing, compression straps, ergonomically designed and adjustable padded shoulder straps. All over camouflage print.