Weaving Laptop Trolley Backpack with Spinner Wheels and External USB PortWhether you carry it on your back or roll it along behind you, this cabin size trolley backpack offers casual style and comfort for daily use. It is made from durable fabric and features a classy design with a double shaft retractable handle, shoulder straps for versatility and four spinner wheels that offer incredible mobility. This backpack has a spacious main compartment to hold books or clothing for an overnight trip, laptop and tablet