The Seven Jack-3WD Trolley is a backpack in all respects, but has a detachable trolley with 10 cm wheels. The backpack is spacious and can be filled with everything you need: books and notebooks for school, but also a water bottle that you can put in the inside pocket. The padded back and shoulder straps also make the backpack comfortable to wear on your shoulders, whereas if you attach it to the trolley, you’ll have an handy, stable, practical and safe product to carry with you.