The M.U.L.E. (Medium-to-Ultra-Long Endeavors) is CamelBak?s best seller. It is more streamlined than ever, and the 100 ounce reservoir and extra cargo space make the M.U.L.E. perfect for extended hikes and bike outings. Versatile bungee keeper adds storage for light jacket or wind shell. ? Mesh back panel and harness keep you cool and dry. ? Triangle mesh pocket holds helmet and gear. ? Reservoir compartment features an easy-access perimeter zip. ? New closed-cell wishbone harness system for comfort and stability. ? Moisture-wicking back panel and harness keep you cool and dry. ? Floating cargo pocket with internal tool organizer and key keeper. Removable waist belt. ? Additional storage area behind the floating pocket. ? Big Bite? Valve and Screw Cap closure. ? New Deluxe Ergo Angle? provides ergonomic Bite Valve positioning. ? Available in forest green/black (shown), black/gray and cobalt/black.