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: Lightweight Exoskeleton * HARNESS: Ultra-light 3-D Mesh Independent Suspension with Slider SternumStrap * BELT: Fixed 1 in (25 mm with cargo pockets * Additional Features: Ultra-light materials, media pocket, bike tool organizer pocket, stretch overflow helmet storage, four point compression