If theres one thing we know best its water our athletes customers and colleagues told us they wanted a reservoir that delivered more water per sip with a foolproof design that made it easy to fill up and hit the trail 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 like all of our gear we put the crux through exhaustive stress tests to make sure that it wont fail you on the trail