Imprint Method: UNIMPRINTED - The High Sierra® Drench Hydration Backpack features a large main compartment that holds a 2-liter water reservoir with a hands free water reservoir pressure valve. Hinged front pocket holds a helmet. Insulated water tube cover. Vapel™ mesh Airflow™ adjustable shoulder straps. Waist and sternum straps secure pack while active. Includes lifetime warranty.