Construction High density EPS (Expanded Polystyrene) High impact ABS shell Features • 16 vents • Top vents have opening and closing button • Goggle clip • Advanced 7cm rear dial adjustable fit system • Heat sealed removable and washable interior pads • Removable and washable Ear pads Standards CE EN1077 / ASTM F2040 HELMET SIZE GUIDE XS 48-54CM S 54-56CM M 56-58CM L 58-60CM XL 60-62CM XXL 62-64CM