Rothco’s Venturer Hydration Systems has a Spring-Hinged Bite Valve, Detachable Hose, Easy-Fill Bladder, 600 Denier Polyester Construction, Nylon Lining, Padded Mesh Back, Vinyl-Lined Padded Adjustable Shoulder Straps, Waist Straps, Top Carry Handle, 17" X 8”. Rothco’s hydration pack is ideal for any outdoor or survival situation. 2.0 Liter capacity.