Therersquos a reason this is one of our bestselling longest running packs itrsquos got everything you need and nothing you donrsquot the camelbak mule hydration pack has a narrow gauge design that keeps it light and maneuverablemdashso even when itrsquos fully loaded for a day of mountain biking it wonrsquot get in your way the latest edition is built around the brand new crux reservoir which is even easier to load and refill and delivers more water with every sip since