HJC Solid Mens CL-X7 Off-Road/Dirt Bike Motorcycle Helmet, XXXXX-Large Advanced Polycarbonate Composite Shell : Lightweight, superior fit and comfort using advanced CAD technology. Impact absorbing multiple density EPS liner. Revolutionary design with unique visor. ACS Advanced Channeling Ventilation System: Full Front to Back Airflow Flushes Heat and Humidity Up and Out. DOT FMVSS 218 Certified