Product name: Business travel backpack Theft protection: invisible zipper so that the thief cannot start USB charging: External USB charging interface, integrated mobile power connection, free hands, charging while walking, small innovations are great and convenient. Waterproof: The material consists of scratch-resistant, wear-resistant and water-repellent materials and is extremely tear-resistant. Ergonomic design: S-shaped shoulder strap, ergonomic design, breathable shoulder strap, elastic decompression, comfortable and easy carrying, breathable decompression. Reflective strip: design of the front reflective strip, safe and protected Details: comfortable portable design, adjustable shoulder strap design, hardware design with double zipper Size: width 30 * height 45 * thickness 14cm