High Sierra Classic 2 Series Longshot 70 Hydration Pack Large, front-load main compartment Separate, side-access hydration reservoir compartment makes it easy to access your water supply 2-liter hydration system has a wide opening reservoir for easy filling and cleaning; System is BPA free and antimicrobial Hands-free reservoir pressure valve Insulated water tube cover helps to prevent water from freezing in the tube Hinged front pocket holds a helmet; Front zippered pocket holds bicycle tools, accessories or media player