ITEM NAME:3L Hydration Water Bag Pouch Backpack Bladder for Hiking Climbing Survival N2O6 3L Hydration Water Bag Pouch Backpack Bladder for Hiking Climbing Survival N2O6 Constructed by waterproof 600D high density Nylon material. Two layers cargo design, one for hydration bladder, and the other for extra carrying purpose. Adjustable shoulder strap and chest belt, suitable for heavy carrying. Equipped with a tube with a bite valve to drink, so you don't need to hold it to drink. A switch on/off bite valve, convenient for control the flow of water. Perfect to use when hiking, climbing, riding and other outdoor actives. This Black Hydration Water Backpack is useful in desert, forest, rock-climbing, riding and when you aren't convenient to drink by hands. This water backpack uses a tube with a bite valve to drink, so you don't need to hold it to drink. Specification: Color: ACU camouflage Digital Hydration Bladder Capacity: 3L Item Size:44 * 21cm(17.32 * 8.27inch) Package include:1 x3L Hydration System Water Bag Note:Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm..Two layers cargo design, one for hydration bladder, and the other for extra carrying purpose. Hydration Bladder Capacity: 3L. Perfect to use when hiking, climbing, riding and other outdoor actives. Equipped with a tube with a bite valve to drink, so you don't need to hold it to drink.