3V Gear Bandit Hydration Pack - Compatible for Military Gear, Travel, Man Bag, Marathon, Hiking Large 1628 cubic inches of storage for tons of gear for any mission, operation, or day trip Large self-healing zippers give easy, wide access to compartments and subcompartments Made with 600 D PVC backed nylon which gives the large backpack some rigidity, makes it weather resistant, and super rugged MOLLE compatible for pouches and attachments Hydration bladder ready