* advanced polycarbonate shell construction: Quiet, aerodynamically tuned design for wind tunnel tested comfort * EPS-lined chin guard for extra protection. * Ventilation system: Adjustable, indexed front & rear vents with aerodynamically tuned rear spoiler reduce lift, create vacuum & maximize airflow through the helmet Article: Scorpion Exo 390 Cube Helmet, black-green, Size M Article: Scorpion Exo 390 Cube Helmet, black-green, Size M, black-green, Size M