Mens ski helmet application allround special features goggle compatible ventilation with ear pads adjustable size with y clip earpads removable intergrated headphones construction hybrid ventilation technology k2 dual active matrix ventilation adjustable fit system k2 360 k2dialed fit system colour green type of helmet half shell helmet chinstraps adjustable padded security standards astm f 2040 en 1077 inner linings washable removable series k2 diver