This cool backpack made from polyester not only looks great but also features a USB port for mobile charging. The interior includes one large compartment, a side pocket for a laptop, and three open storage pockets. A battery/power bank is sold separately and connects to the internal port inside the bag. The shoulder straps are adjustable, just like a regular backpack. One-size. Dimensions: Length 300 mm, Width 140 mm, Height 400 mm.