Includes the new Antidote Reservoirthe ultimate cure for dehydration. * Antidote features: Quick-seal cap, lightweight fillport, low-profile design, patented Big Bite Valve, HydroGuard technology, PureFlow tube, easy-to-clean wide-mouth opening * BACK PANEL: Diamond mesh * HARNESS: Lightweight mesh * Additional Features: Front and back reflectivity, Stash pocket, Phone pocket