Ladies ski helmet mens ski helmet special features with y clip ventilation recco system earpads removable audio compatible ventilation technology poc ventilated double shell anti penetration system vdsap closure system micrometric buckle helmet technology mips colour white type of helmet half shell helmet number of air vents 6 chinstrap adjustable security standards astm f 2040 en 1077 b en 1078 inner shell epp series poc receptor weight 640 g s