"Stay light, mobile, and hydrated on short hikes with the Osprey Sportlite 15 Hydraulics Hiking Hydration Pack! An included Hydraulics LS 2.5L reservoir sits in the internal hydration sleeve, delivering on-demand, on-the-go hydration through flexible tubing and magnetic bite valve on the sternum strap. Meanwhile, there's plenty of room for your hike essentials in the wide, dual-zip, panel-access main compartment. Plus, a front-panel zip pocket, key clip, and mesh side pockets offer easy-access storage for must-have items. An AirScape back panel incorporates a close-to-the-body design, mesh-covered foam, and ventilation channels allow you to move comfortably. In addition, an Atilon foam frame sheet adds stiffness to the back panel for load support. Adjustable sternum strap and a webbing hipbelt with padded wings let you dial in your fit. This Osprey hydration pack also features a safety whistle on the sternum strap, upper-side compression straps (which can also capture trekking pole handles), lower front loops for capturing trekking-pole tips, and an attachment loop for a blinker light (not included). Made of bluesign APPROVED 100% recycled nylon. Mesh is made of bluesign APPROVED 100% recycled polyester. Imported. Made of bluesign APPROVED 100% recycled nylon Mesh is made of bluesign APPROVED 100% recycled polyester Includes Hydraulics LS 2.5L hydration reservoir Magnetic bite valve on the sternum strap Wide, dual-zip, panel-access main compartment Front-panel zip pocket with key clip Mesh side pockets Breathable AirScape back panel lets you move comfortably Atilon foam frame adds stiffness to the back panel for load support Adjustable sternum strap with safety whistle Webbing hipbelt with padded wings Upper-side compression straps Lower front loops Attachment loopSpecs: 17.3""H x 11""W x 7.9""D Capacity: 15L Load Range: 520 lbs. Weight: 1.4 lbs."