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. Lightweight Enduro backpack . AC Air Channel back system: perfect ventilation and high comfort. Shoulder strap made from breathable fabric. Compression straps. Adjustable chest strap and detachable hip belt. Mesh side compartments. Reflective elements.