Crux lumbar reservoir give your pack a lower center of gravity with the brand new crux lr reservoir it delivers 20 more water per sip while keeping weight positioned low on your back which translates to better stability in the saddle and on the trail the crux delivers 20 more water with every sip plus an onoff lever that seals your tube shut when youre not drinking we also upgraded the fill port design to include an ergonomic handle and a redesigned a cap thats more intuitive and easier