Hydrapak E-Lite Hydration Vest (Blue) Hydration Vest Pack Includes 1L (32oz) Elite Reservoir Hydration Bladder with Plug-N-Play, Quantum Clip and Surge Bite Valve Weighs just a mere 9.9 ounces Features 2 Exapandable front zippered pockets and 4 holsters on the front straps. Rear pouch can carry the included 1L reservoir or can be used for light storage Ultra-Light Weight materials