The CamelBak Hydrobak Light 50oz is a low-profile pack for outdoor adventure. Fill the included Crux 1.5L Reservoir with Quicklink System with water and slip it inside the pack, and the hose can be snaked through either shoulder strap for tube management and easy access to the bite valve while you're on the move. On your feet, on the bike, head wherever nature takes you. The breathable Air Support Light back panel keeps things cool against the body, along with the ultralight mesh straps. An additional one liter of space offers room for a snack bar, keys, wallet, and phone.