This minimalist pack comes with 2 liter bladder, deep pocket for snacks and wallet, exterior bungee with barrel lock. Low-profile athletic cut rides above jersey pockets, below bike helmets. Adjustable waist & shoulder fits men and women. Wide mesh straps and chest shock absorber reduce bounce. Cushioned ventilated back panel. FDA-compliant food grade bladder constructed with triple-heat sealed edges, 2" opening for easy fill and cleaning, heavy duty kink-free sip tube, cushioned bite valve and a twist-lock to prevent leaks. Size: 16.5"x 10.5"x 0.7".