Reservoir Camelbak Crux Lumbar 1.5L - BlueReservoir Camelbak Crux Lumbar 1. 5L Blue Our Crux Lumbar 1. 5L Reservoir carries plenty of water but won't slow you down. Its streamlined design sits snugly and securely while staying out of the way, so you can stay focused on the road ahead. By keeping the load off your back, you'll be able to breathe easier and ride longer. Features HighFlow: The Crux Lumbar Reservoir delivers 20% more water per sip, with an ergonomic handle for easier refilling