"Lightweight, low profile, and rugged, the Hydrapak Contour Hydration Reservoir offers a great fit and performance in a wide variety of outdoor packs (not included) for all outdoor adventures. A great tool for extended backpacking, hiking, and mountain biking adventures, this durable reservoir features a 3D bottom, dual Shape Loc baffles, and a side exit port to offer a better fit in more packs. Its Unifit hanger works with clips, hooks, and loops in a wide variety of packs, including Osprey, CamelBak, Gregory, Dakine, EVOC, and more. Made of a 100% BPA-, BPS-, BPF-, and PVC-free thermoplastic polyurethane (TPU), this reservoir features RF welded seams for long-lasting durability and elasticity and can even be frozen. Its internal drying tab allows you to easily turn reservoir inside out for deep cleaning and complete drying. A high-flow design, this reservoir includes a 36"" drink tube and high-flow, self-sealing Comet bite valve. The Contour also comes with a handy tube magnet for the reservoir hose and your favorite pack to ensure easy access for the tube and bite valve. Made with the Plug-N-Play connect system, this reservoir allows users to easily disconnect the drink tube for easy refills without worry thanks to its auto shutoff valve. Lightweight, low profile, and stable reservoir Built to fit in a wide variety of outdoor packs Unifit hanger - works with packs from Osprey, CamelBak, Gregory, Dakine, EVOC, and more 3D bottom, dual Shape Loc baffles, and a side exit port - low profile and stable Made of a 100% BPA-, BPS-, BPF-, and PVC-free TPU RF welded seams for long-lasting durability and elasticity Internal drying tab - lets you turn reservoir inside out for deep cleaning and complete drying Comes with 36"" drink tube and high-flow, self-sealing Comet bite valve Wide-opening Slide-Seal top Handy tube magnet - ensures easy access for the tube and bite valve Plug-N-Play connect system - easy refills"