Features Nalgene® reservoir with quick-disconnect hose makes filling and cleaning a breeze; no need to remove hose from pack Features an insulated reservoir pocket that maintains temperature of liquids, whether hot or cold Highly breathable E-VAP™ suspension's perforated foam backpanel cuts weight and ventilates through air channels Panel-loading main compartment opens wide for packing and unpacking, and makes it easy to locate a particular item Front mesh pocket and two side mesh pockets can carry snacks or other essential items you need to have easily accessible Internal organizer keeps essentials such as sunglasses, sunblock, keys and wallet easily accessible Sternum strap features an integrated Safe-T whistle Reflective accents increase your visibility in low-light conditions