500D 56/36/8 nylon/polyester/PU,Lining: 100% polyester,Holds most 15" laptops,Padded internal laptop and tablet sleeves with self-grip fastener,Water bottle side pocket with adjustable self-grip fastener and zipper closure,Removable sternum strap,Padded back panel and straps,Adjustable side straps,Bottom panel,Product logo on front pocket