The Camelback M. U. L. E is the original & possibly the worlds leading mountain bike hydration system. Updated for 2011 the M. U. L. E utilises lighter fabrics & incorporates XC helmet carry. This pack combines everything you require in a technical backpack with quality & value to provide you with everything you need to enjoy your day out on your bike. Features the Air Director back panel, Hypalon reinforced independent suspension harness, ideal combination of organised & overflow storage, fleece lined media pocket & slider sternum strap with removable waist belt.. Weight exc. reservoir: 670g. Hydration: 3.0 Litres Antidote with Quick Link System. Total capacity: 12.5 Litres.