CAMELBAK HiViz color Tear-away harness helps prevent accidents, Integrated cover keeps Antidote fillport clean and protected, Includes Quick Link Modular Connection System with positive shut-off HydroLock Reflective strips on pack and harness stand out day or night Closed cell insulation keeps water cool for hours Bite Valve Cover keeps Bite Valve clean from dirt and debris External fill via the Antidote Reservoir makes filling and cleaning fast and easy