Mens ski helmet special features ventilation with ear pads adjustable size goggle compatible with y clip with brim earpads removable audio compatible ventilation adjustable ventilation construction hybrid ventilation technology smith airevac 2 ventilation adjustable fit system boa fit system colour black type of helmet half shell helmet number of air vents 21 chinstraps adjustable padded security standards astm f 2040 en 1077 b outer shell polycarbona