Leakproof Slide-Seal Opening – A one-handed top closure design opens wide for easy filling and cleaning, then seals securely to prevent leaks on the move Rigid & Stable Backer Plate – A lightweight, internal backplate adds structure to help the reservoir slide into your pack and stay upright during use Slim, Slosh-Free Profile – A central baffle reduces water slosh and helps the Osprey Hydraulics 3 L Reservoir maintain a streamlined, low-bulk shape when full Magnetic Bite Valve & Hose – Reservoir includes a high-flow bite valve with on/off switch and magnetic attachment for convenient drinking access while hiking, biking, camping, fishing, traveling and more BPA-Free, Pack-Compatible Design – This extra-large reservoir works with most hydration-compatible Osprey packs and the HydraClip hanger system for quick integration Item Dimensions: 17.3H x 7.5W x 0.4D in; Item Weight: 0.52lb