If you're plunging into the backcountry, bring along CamelBak's M.U.L.E. Efficient and compact, this system totes 100 ounces of liquid (more than 4 large water bottles) and sports thoughtfully distributed cargo space with internal organizers for tools and gear. The Air Director ventilated back panel keeps you dry and the Dynamic Suspension harness delivers excellent support. Plus, the M.U.L.E. even has a weather-resistant electronics pocket and a place to carry your XC helmet.