This Segway-Ninebot helmet is a stylish and safe helmet, made for children. The helmet is made of polycarbonate (PC) and Expanded Polystyrene (EPS) technology. This makes the helmet lightweight, safe and comfortable. The adjustable spin dial inside the helmet will give a more accommodating fit. Furthermore the helmet has an excellent breathability design for extra comfort and fast cooling. The helmet fits people with head circumference of 50-55 cm.