• High impact ABS shell and high-density EPS liner.Meet CE EN12492 climbing helmet certification.
• Sideways vent hole, for breathing and preventing tiny gravel.
• Adjustable back of head closure system.
• Headlamp buckles are suitable for universal headlamp assembly.
• Large(21.6-23.6in)|(55-60cm). Small(19.3-21.6in)|(49-55cm).