Water Backpack Black Hydration Backpack with 3 Liter Bladder Lightweight & Waterproof Hydration Pack for Hiking, Cycling, Running,Climbing Outdoorer ,Gift for dadLIGHTWEIGHT & COMFORTABLE: The hiking water backpack is made of black 800D oxford fabric, which is resistant to dirt, can be waterproof, wear resistant and scratch resistant, the back panel of the backpack is made of soft padding can avoid rubbing the skin when you are exercising, the adjustable shoulder straps can be more close to your back and make the backpack less shaky, which will make you lighter and freer when you are running, biking, hiking,