COX SWAIN HELMET SKI / SNOWBOARD WITH SONIC SYSTEM CONTROL LTD, Color: Silver / Orange, Size ... - ABS outer shell, EPS INTERIOR VENTILATION: OPTIMIZATION OF AIR TRAFFIC two adjustable openings, CE EN 1077 Decomposition Systems setting behind the head, optional: soundsystem Sizes: XS = 53-54 cm, S / M = 55-56 cm, M / L = 57-58 cm, L-XL = 59-60 cm