This backpack is made of high-density nylon fabric, which is scratch-resistant and easy to wipe. The size is 12.2*7.9*16.5 inches. It is water-repellent and impermeable. It can effectively withstand rain and protect your personal valuables. The large-capacity backpack can be expanded by 30% according to your own needs. It has multiple compartments that can accommodate a 15.6-inch computer and a built-in USB charging design. The overall backpack is sturdy and can be carried in a variety of ways, and the price is reduced, making your travel more convenient. You can customize your logo on the front.