The Baby Nutty is made of a durable PVC shell and a high quality, impact resistant EPS foam layer inside. Increased safety thanks to the MIPS system. Fidlock magnetic buckle to prevent pinching. This child protection is adjustable thanks to an elastic band and a set of foams. These 3 mm thick foam plates, supplied with the helmet, ensure a good fit on the head, allowing the helmet to adapt according to the evolution of the child's size, with a head size of 47 to 50 cm.