If there is one thing that we master perfectly, it is 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 easier to fill and run. The all-new CRUX delivers 20% more water per sip, with an ergonomic handle for easy filling, and an on/off lever that makes it easy to prevent leaks. Like all of our other gear, we've put the CRUX through exhaustive stress testing to make sure it won't let you down along the way.