This Plain Color Water Resistant Canvas Backpack with USB port - Khaki is very nice backpack in large size. You can put the basketball or even notebook in this bag. It is a special design with USB port outside the bag. You can charge your mobile by plug the charging cable in the port so that you don't need to hold the power bank on hands. (see the image) No worry about your backpack will getting wet when it rains, as there is water resistant coating. High recommend to use it as your school bag or travel backpacks.