* advanced polycarbonate composite shell construction: Quiet, aerodynamic 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 490 Supernova Helm, black-yellow, Size M Article: Scorpion EXO 490 Supernova Helm, black-yellow, Size M, black-yellow, Size M