G4Free Hydration Pack Sports Runner Hydration Backpack with Bladder (19.68"x 8.26"x 4.72") 3.0L HYDRATION WATER BLADDER INCLUDED: No more plastic bottles to take up space HIGH QUALITY MATERIAL: tough and water resistant high-density 600D polyester fabric,construction rope, high quality buckle 2 FRONT POCKETS and 1 MAIN POCKETS: Use the front pockets to carry your wallet, keys, phone, towel, small tools or other items; the main pocket can organise your other large stuff well MULTIPURPOSE:Perfect for hiking,running,cycling,walking or taking with you for a day LARGE CAPACITY: The wole pack size: L 8.26 * H19.68 * W 4.72 IN,Volume:12L; Bladder 3L .Enough space to hold your necessities for travelling.NOTEIt will be easier to suck the water out if you colud suck the air out first when receiving the bladder.