Kids ski helmet special features goggle compatible ventilation with ear pads earpads intergrated headphones construction hardshell adjustable fit system uvex ias system closure system monomatic buckle colour white type of helmet half shell helmet security standards astm f 2040 en 1077 b en 1077 a inner lining hypoallergenic outer shell abs inner shell eps series uvex hlmt size adjustments infinetly adjustable rotary adjustment system