Bellelli website says:
Bellelli Mr Fox is approved rear bike seat complying with the European Regulation EN 14344, certified for children weighing up to 22 kg / 48.5 lbs.
An ergonomic backrest with an integrated helmet slot to ensure maximum comfort and support to the child’s back and neck, height-length-depth-adjustable safety belts and a very soft seat pad. A quantum leap in comfort and safety!
Five-point height/length/depth-adjustable harness and 3 height slots in backrest.
Integrated helmet slot, wide seat, high sideboards to increase support.
Childproof, parent-friendly, “one hand” easy-on/easy-off safety buckle.
Light and resistant non-toxic plastic frame.
Footrests height-settings range: 15cm – 5.9”, four positions adjustable straps.