DOT approved modular motorcycle helmet dual mirrors-I132Product Features: Modular flip design for smooth opening and closing, instantly improving facial ventilation. Upward sloping streamlined rear spoiler effectively guides airflow, reducing head sway and wind resistance by 25% at high speeds. Hidden dark inner sunshade lens that can be instantly switched, improving visibility by 35%. Standard configuration includes a high definition clear PC outer lens and an internal sunshade lens. Strictly compliant