HJC CL-X6 Frenzy Off Road Helmet Yellow Advanced Polycarbonate Composite Shell: Revolutionary design with unique visor. Lightweight, superior fit and comfort using advanced CAD technology. ACS Advanced Channeling Ventilation System: Full front to back airflow flushes heat and humidity up and out. SpeedCool Interior: Removable, moisture-wicking and odor-free with anti-bacterial fabric. Large Eye Port: For maximum visibility and superior goggle fit. SNELL/DOT Approved SIZES: XS-XXXL (XXXL DOT Only)