Camelbak ultra 10 vest 70oz hydration backpack camelbak39s most technical run vest designed and tested with professional endurance athletes includes features and storage for ultra events the brand new crux delivers 20 more water per sip with an ergonomic handle for easier refilling and an onoff lever that makes it easy to prevent leaks this year the most rugged vest gets an upgrade with lighter materials and more water with every sip the ultra 10 was designed to endure one of the toughest trai