The Seven Jack-4WD CHALLANGE BOY Wheeled Backpack, equipped with a 4 double-wheels system with 360 ° rotation for even easier maneuverability, combines style and versatility. In fact, in a few simple steps, it turns into a backpack and vice versa. The trolley has a reinforced bottom and corner protections, giving stability to the trolley and protection to the content. Unhook it and you have a washable backpack, with a lot of room, a front pocket and it is comfortable to wear thanks to the padded back and padded and breathable shoulder straps. When it is used as a trolley, the shoulder straps can disappear in the back or, thanks to the CROSSOVER SYSTEM, automatically rise-up by pulling up the resistant double telescopic bar with two height adjustments, in order to not drag the belts on the ground.