Fabric:100% polyester fiber; Lining:100% polyester fiber; Capacity:20L; Size:40x25cm;Features:Lightweight And Roomy: Weighs about 600g. The capacity of our Internal Frame Backpack is 20L, perfect for carrying all essentials such as hiking gear, camera, water bottles, sleeping bag, camping tent. Professional Hiking Backpack: For passionate hikers or trekkers, this hiking backpack made of high quality water and tear resistant polyester fabric, provides extra strength and long-lasting performance. It has hydration system, whistle and many hanging buckle straps, which is perfect as a hiking daypack or travel backpack. Multi Compartments And Comfortable: One main compartment, one front compartment, one outside zip pocket, one rain cover storage bag, two side pockets. Padded back and shoulder straps filled with soft mesh material, so you will sweat less on the back and never feel tired for both men & women.Package included: 1 x ZENPH 20L Cycling Backpack;