GBX Gear&reg; Tactical Assault Military Army Style Backpack with Hydration Water Bladder Included Water Resistant Rucksack Durable nylon backpack suitable for anything from an intense hiking session to a leisurely camping trip Features a spacious main compartment with zip-up closure, interior zip-up and mesh pockets, and front storage zip-up compartments Secures to your back with an adjustable chest belt and hip belt clasp Padded and adjustable shoulder straps relieve pressure on shoulders while carrying heavy loads 3.0 L Water hydration bag included. No more plastic bottles to take up space.