Size of Backpack kids rolling backpack32L20W45cmH 126L787W177InchH Weight18KG Sixwheel design The sixwheel design is not only suitable for flat roads but also for stairs The height of the trolley bag can be adjusted freely it is very easy to dismantle and there are a variety of carrying methods to meet the different needs of children Large Capacity1 zippered main compartment 3 front zippered pockets 2 water bottle side pockets 1 zippered inside pocket and 1 laptop inside pocket Elemetary Rolling BackpackThe schoolbag with wheels is made of aluminium trolley bar which is strong and lightweight The trolley bar on the back of the school bag is easy to install and simple to operate Rolling Backpack for Boys Lightweight and portable suitable for school work weekend trips travelling and more