The new Premium Trolley offers all the advantages of a detachable trolley, with a greater ergonomics of movement and stability thanks to its large and silent wheels, with bearings. In addition, its front legs are opened with a carefully studied angle to prevent the trolley from tipping over. 2 uses in 1: All the strength and durability of a fixed trolley but now detachable so you can also use it as a backpack and wash it whenever you want.. Large wheels with off road bearings and a roll over system. Resistent bottom board. School backpack with special thicker zipper and an interior organizer. It has ergonomic shoulder straps with breathable mesh. Lateral pocket for water bottle. Top grip webbing and bottom union zipper. It also has a special hook to hold the webbing and prevent them from dragging on the ground.