Convert the Crux 2L Reservoir Filtration Kit into a gravity bag with the Reservoir Gravity Kit. Prfect for back country campsites or anywhere trustworthy filtration is needed. Easy connection via Camelbak's Quicklink system, this accessory takes your personal hydration out of the pack and into the wild. An essential accessory for any camper or outdoor enthusiast, the Reservoir Gravity Kit clicks into place with ease to convert the Crux 2L Reservoir Filtration Kit into a gravity bag. The Gravity Kit includes a U-shaped tube that connects the reservoir to the filter in a downward orientation via the easy-to-use Quicklink system. A secondary tube extends from the filter body and has an on/off valve allowing for steady flow water delivery. Hang the fully assembled reservoir and allow gravity to provide reliable and clean drinking water.