Stay hydrated during those long rides with our Reservoir, Hydrant, and Vapor packs. Combining large storage with the most water capacity, the Reservoir is perfect for extra long rides. The Hydrant is designed for riders who want the most water capacity and the ability to carry all their essential tools in easy access compartments. The Vapor features a slim profile pack yet still carries an adequate water supply and has just enough room for a few essentials in the exterior pocket. All three packs feature padded shoulders, sternum, and waist straps, and molded air mesh back panels to keep you cool .