The High Sierra Wave 50 Active Outdoor Hydration Pack gives you plenty of easy-to-use hydration ability in a comfortable, adjustable pack. Wherever you go, the 1.5 liter hydration system has an easy access opening that's simple to fill and accepts most water filters. Both BPA free and antimicrobial, you also get a hands-free reservoir pressure valve and hands-free bite valve so you can concentrate on the road ahead. An insulated water tube keeps your water from freezing, and for those hot days, the mesh padded back wicks moisture away from your skin. Adjustable shoulder straps provide ultimate comfort, and a reflective loop for a bike LED blinker makes sure you're safe on the road.