1. With a separate laptop compartment, it can accommodate 15.6-inch laptops (or 15-inch, 14-inch and 13-inch laptops). With a spacious storage compartment, you can easily store daily necessities and electronic accessories. The front compartment has multiple pockets, pencil cases and key chains, so that your items are organized and easy to find. 2. The pressure-reducing breathable shoulder strap is comfortable and not sultry. Through the tested backpack system, the combination of comfortable elastic foam and the outer layer makes the backpack comfortable and durable. 3. Three-layer protective padded breathable pearl cotton shoulder strap, the inside of the shoulder strap is made of honeycomb sponge, which is not tight to the shoulder; Take it easy and relieve shoulder fatigue. 4.USB port design: external USB charger, internal charging cable, this USB backpack allows you to charge your mobile phone more conveniently while walking. Please note that this backpack cannot supply power by itself, and the usb charging port is only convenient for you to charge. 5. Sturdy and durable: made of waterproof and durable Oxford fabric with metal zipper. Ensure that it is safer and more durable in daily and weekend use. It can be used as a professional office work bag, a slim USB charging backpack and a university high school student backpack, and is suitable for boys, girls, teenagers and adults.