With built in USB charger outside and built in charging cable inside, this usb backpack offers you a more convenient way to charge your phone while walking.
Headphone Jack: you can listen to your favorite music on the go hands-free
Made of high-density Nylon fabric with smooth zippers. It's lightweight, well-stitched, water-resistant. Ensure a long-lasting usage for work or travel. Comfortable and breathable sponge mesh design of the back and straps, relieves the stress of your shoulder, keeps cool for a long time carry on