Outdoor Products Hydration Backpack with 2-Liter Reservoir, 17.7-Liter Storage Streamlined design has all the hydration and storage you need for a long ride Padded 3D mesh back panel for ventilation; sternum and waist straps help distribute the load Includes 2-liter water reservoir with low-profile cap, soft, flexible bite valve, and a detachable hose for easy cleaning Front zippered accessory pockets; two side mesh pouches store easy-access gear or addiitonal water bottles Backed by the Outdoor Products Plain + Simple Lifetime Guarantee