Locking the Snap-Zip baffle in place gives our hydration reservoir /bladder a slim profile and sits flatter against the back * BPA Free * The complete hydration system includes our Straight Shot Plug-N-Play, 36-inch Hydraflex tube, Elite Surge Valve, and Elite Quantum clip * Reversible and the easiest to clean on the market. * 100 oz. ( 3 Liter): 6 ¾? x 16 ½?