CVLIFE Hydration Pack with 3L Backpack Water Bladder for Hunting Climbing Running and Hiking Hydration Bladder Capacity: 3L; Size: 45 X 21cm; Net Weight: 460g( 16.23oz) Two Layers cargo design, one for hydration bladder, and the other for extra carrying purpose. Equipped with a tube with a bite valve to drink, you do not have to hold it to drink. With a pouch on the back of the pack, you can carry your phone, keys and some small tools easily. Constructed by waterproof 600D high density Nylon material and with the high quality bladder, it can keep the water cool for hours. Hydration Bladder Capacity: 3L Size: 45 X 21cm Net Weight: 460g(16.23oz) Material: 600D high quality Nylon material Equipped with a tube with a bite valve to drink, you do not have to hold it to drink. Constructed with waterproof 600D Nylon material, the backpack is wearable and durable. Completed with a switch on/off bite valve, its convenient for you to control the flow of water. With the adjustable shoulder strap and chest strap, its suitable for heavy carrying and secured enough so that will not distract you when you do some exercises. About 460g(16.23oz), the CVLIFE Hydration Pack is light weight and suitable for running, hiking, hunting, climbing and other outdoor activities. 1 x Hydration backpack