The premier mountain bike hydration system. CamelBak’s signature hydration system for mountain bikers, the M.U.L.E. hydration pack offers plenty of technical features, a secure fit, and 100 ounces of cool hydration. The M.U.L.E. is built for comfort, with an Air Director back panel and a Dynamic Suspension harness. The back panel is equipped with lumbar support and an Air Mesh construction, so your back will stay cool and comfortable even after several hours on the trail. The Dynamic Suspension harness, meanwhile, teams with the dual compression straps and slider sternum strap to distribute the weight evenly across your torso. Hikers will also love the variety of storage options, which includes a large main compartment, an easy-to-access MP3 pocket with a weather-resistant zipper, an organizer pocket for biking essentials, and quick-access overflow storage with dual compression straps.