You'll "drink" in success with the High Sierra(R) Piranha 10 liter hydration pack! Great for bikers, runners or hikers, this pack has a large front-load main compartment for gear and Add-A-Bag loops for securing it to a larger bag. The BPA free, antimicrobial, 2-liter hydration system has a wide opening reservoir for easy filling and cleaning. An insulated hose cover prevents water from freezing in the tube while elastic loops allow convenient positioning!