1. USB charging backpack with charging cable is convenient for charging smart phones/tablets/other devices when walking. Please note that this backpack cannot be charged by itself, and the usb charging port only provides a convenient charging method. 2. Ergonomic shoulder straps, ergonomically designed, scientifically loaded by cutting and pasting shoulders, without increasing the burden on the spine, have breathable decompression and earthquake-resistant effects, so that you can experience comfortable carrying. 3. Water-proof Oxford cloth is light and wear-resistant, and it is made of water-proof fabric, which is rain-proof, penetration-resistant, scratch-resistant and wear-resistant, making the backpack more durable. 4. This fashionable backpack can be used as laptop backpack, university backpack, work backpack, 17-inch portable backpack, high school backpack, travel backpack, business backpack, computer bag and personal carry-on backpack. In most festivals, it is also an excellent gift for father, boyfriend, friend, husband and son. 5. Strong loading and storage capacity, enough space in the main compartment of the backpack and perfect pocket design to meet various travel needs. Multiple zipper pockets make it extremely convenient for you to take and put things, and you can put down a 15.6-inch laptop.