Strong and safe: Shock-absorbing rigid foam foamed into an impact-resistant outer shell, the In-Mold process creates a durable bond for a robust helmet. Size adjustment: Adjustment wheel for a good fit. By turning the adjustment wheel, the head-enclosing ring inside the helmet adjusts to the head circumference. Product details: Children's bicycle helmet for the little ones, weight 240 g, colour orange with monster pattern (Orange Monster), Size M = head circumference 50 - 55 cm, includes chin support. For ponytails: Height-adjustable system at the back of the head can create enough space for a ponytail or braid, perfect for children with long hair.