Ladies ski helmet mens ski helmet application ski touring special features goggle compatible ventilation with ear pads adjustable size with y clip earpads removable construction hardshell ventilation technology smith airevac ventilation adjustable fit system smith optics self adjusting lifestyle colour blue type of helmet half shell helmet number of air vents 14 chinstraps adjustable padded security standards astm f 2040 en 1077 b en 1078 outer shell