Size:
M: 54 to 58 cm / 21,26 to 22,83''
L: 58 to 62 cm / 22,83 to 24,41''

Weight:
M: 250g / 0,55 lb
L: 260 g / 0,57 lb
 
Cooling vents:: 20
Construction: Glue-On
Standards: CE - EN 1078 - Complies with standard EN 1078 for cycling helmets, skates, and skateboard. Not suitable for motorsports.

Other features:
Removable visor.
Dial Retention System.
Chin Pad: Sleek Look without Loose straps.