The Camelbak Crux 3 Litre Lumbar Reservoir is designed to work with Camelbak’s range of Low Rider packs. These packs site the reservoir over your lower back, making them more stable on the trail & while pedalling, & reducing strain on your shoulders. The Crux reservoir delivers 20% more water with every sip compared to previous generation Camelbak reservoirs, plus an on/off lever that seals your tube shut when you’re not drinking. The fill-port design has also been upgraded to include an ergonomic handle & a redesigned cap that’s more intuitive & easier to fill—small changes that make it that much easier to fill up & hit the road.