Polyester lining Zipper sealing Handwash only Internal structure of the bag: zipper bag, mobile phone bag, certificate bag, mezzanine zipper bag, computer plug Open cover method: zipper Material: Nylon Whether to bring a lock: No Whether there is a rain cover: none Function: breathable, waterproof, wear resistance, anti -theft, earthquake resistance [Big Upgraded Edition] Increase capacity, improve comfort, and reduce back pressure. [Women's Travel Backpack] This backpack is made of waterproof and durable polyester. It has good breathability and heat dissipation. It is equipped with two shoulder straps with pads. cool. It is sturdy, sturdy and does not fade. [Independent shoe partition design and wet bag] Main bag X 2, laptop composition X 2, and many other different use pockets. Wet bags are made of high -density waterproof materials, which can help you separate wet and wet items. If you have wet clothes or towels, you can put them in a wet bag. A separate shoe cabinet can help you move your shoes better and store them in the travel package