Built from 200-denier recycled nylon, Our Ascend® Tarim 4 Hydration Backpack is lightweight and perfect for mountain biking or short hikes. Its hydration-compatible design accommodates up to a 2L reservoir (included), making it easy to stay hydrated on the trail. A breathable 3D-wave back panel with mesh pairs with the mesh-lined shoulder straps to keep you cool. A fast-access front pocket with a key clip offer convenient storage. Reflective materials boost visibility in low light, and YKK® zippers offer reliable performance. Finished with a sternum strap with hydration-tube clip and whistle. Whether you're chasing flowy single track on your bike or exploring new trails by foot, the Ascend Tarim 4 Hydration Backpack keeps your bare essentials close at hand. 200-denier recycled nylon construction Comes with a 2L hydration reservoir Breathable shoulder straps with mesh linings Ventilated 3D-wave mesh back panel Ample pockets for organization Reflective accents add low-light safety Sternum strap with a tube clip and whistle YKK zippersSpecs: 17H x 8.5W x 4.5D Capacity: 244 cu. in./4L Weight: 1 lb.