Ladies ski helmet mens ski helmet application allround special features ventilation with ear pads earpads removable construction in mold ventilation technology smith airevac 2 ventilation adjustable fit system smith optics self adjusting lifestyle colour orange type of helmet half shell helmet number of air vents 9 chinstraps adjustable padded security standards astm f 2040 en 1077 b outer shell polycarbonate abs inner shell eps series smith maze