Hydration Capacity: 100 oz (3 L * Total Capacity: 200 cu in (3.28 L * Reservoir Features: Quick Link System, 14 turn - easy openclose cap, lightweight fillport, dryer arms, center baffling and low-profile design, patented Big Bite Valve, HydroGuard technology, insulated PureFlow tube, easy-to-clean wide-mouth opening * BACK PANEL: Air Mesh * HARNESS: Ultra-Light 3D Mesh with gel pocket and Slider SternumStrap