* EPS +PC, 1.0mm thick polycarbonate case * One-piece anti-collision *Removable inner pad, easy to clean *20 vents for cooling and ventilation *CE safety certification *Size: M(56-58cm) L(58-61cm) *Head circumference is adjustable *There are three sections of high, middle and low to adjust the position of the back of the head *Weight: M about 250g, L about 270g
