The brand new Crux delivers 20% more water per sip, with an ergonomic handle for easier refilling, and an on/off lever that makes it easy to prevent leaks. Breathable air mesh back panel for a lightweight, comfortable fit. Integrated tool organization keeps your tools organized. Ventilated harness for comfort and breath-ability. Stretch overflow storage compartment lets you easily stash a rain shell or extra layer. Reflective accents for visibility in low-light environments.