School backpack with detachable trolley. 2 uses in 1: the use of a fixed trolley with a sturdy base. With two big, silent wheels for better movement and stability. The position and inclination of its two front legs prevent the trolley from tipping over and the other use of just a backpack, since it can be separated from the trolley through the zipper that joins them. It has two big compartments,a front pocket with an internal organizer. Ergonomic breathable foam straps with Velcro at the end that adhere to the back,so they do not drag on the floor. Pocket on the right side to carry a bottle. Padded top