The Camelbak H.A.W.G. NV Hydration Pack is a great choice for biking the most extreme of terrain. The evolution of the classic HAWG pack, the H.A.W.G. NV features a N.V.I.S. Back Panel. This outstanding design increases the ventilation to provide greater comfort on your ride. Plus, the reservoir compartment is integrated into the backpanel itself, to provide more convenient access to your water and more stable center of gravity. Because when you're taking a tight turn, you don't want to choose between quenching your thirst later or staying upright on your two wheels. In addition to the three liters of water the HAWG carries, this Camelbak pack offers over 1000 cubic inches of storage to carry all your needed gear. Pockets at the waist belts provide quick access to gels or energy bars without needed to take off the pack. When the helmet comes off your head, you can hook it to the HAWG NV for easy access later on. A four point compression helps raise the bar over any other cycling hydration system. Should the skies start to darken in the middle of the afternoon, slip on the integrated rain cover to allow for all-weather excursions in the saddle or on the trail. For your all day mountain bike ride, keep hydrated with the Camelbak HAWG NV Hydration Pack.