Polyester .Imported . Big capacity and regular: This travel backpack has a multi -compartment design with 25L (115.918.5 inches) and includes a main zipper partition, a zipper medium pocket, a two zipper front pocket. In the main bag, there is a water pipe hole on the upper side of the backpack to combine the water bag lining and the water bag system. For men and women, you can easily edit all your needs with this walking backpack . Breeding and waterproof material: This light backpack is made of high quality 210d tear and waterproof fabrics with smooth zipper. Even if the package and shoulder nylon hanger carries heavy items, it is not easy to tear. All stress points are strengthened by Bar-Tacking to extend their life. We also give a rain cover in the lower pocket of the backpack. No matter how the weather is, take this waterproof backpack for men and women to keep all your belongings dry Ergonomic and comfortable design: ventilated mesh filling shoulder straps and rear side, breathing system and light design, making this backpack comfortable even in long walks. Even in summer, keep cool. Perfect daily walking backpack for outdoor sports Unique function and versatile: Stay on your outdoor adventures with unique reflective signs of our camp backpack and elastic fasteners for trekking sticks. The chest buckle also serves as a survival whistle for emergencies. These various sizes of backpacks open air travel, camping, walking and fishing enough options for fishing. Most airlines meet the size requirements. This camp backpack can also be used as a walking backpack, a travel bag and a business bag. Service: If you have any problems, please us, we will answer within 24 hours. (We provide exchange and lifetime customer for quality problems within 1 year)