B-One is Bellelli's rear bike seat suitable for children up to 22 kg, approved according to the European standard EN 14344 by TUV GS.
Ergonomic seat with large ventilation holes on the back and shoulders equipped with a soft cushion that is easily removable and washable, an extremely comfortable safety buckle that can be attached and detached with one hand, continuous adjustment of the height of the feet in 13 positions, high side rails for better containment of the child, large protections to prevent the feet from touching the spokes of the wheels.