SUPOW&reg; Unisex 5L Light Weighted Nylon Sports Hydration Pack Water Rucksack Backpack Bladder Pouch Bag for Outdoor Cycling Bicycle Bike Hiking Climbing-Black Adjustable chest and shoulder straps Easy to use on/off valve on the hydration bladder 2 side storage compartment for keys, phone, snacks etc Ideal for cycling, hiking and other sporting activities With inner pocket,Light in weight