CamelBak HydroBak Water Pack

This versatile hydration system features a 50 oz. Mil Spec Crux™ capacity reservoir and a comfortable, ergonomic design. The rugged OMEGA™ HydroTanium™ reservoir is backed by a lifetime warranty. Use the Big Bite™ valve for easy access to your water – just bite and sip. The closed-cell insulation keeps water cool or warm for hours, and an external zippered pocket provides convenient storage.