With a maximized field of view and high-flow Venturi duct venting, the 509 Mach V Helmet sets the stage for the next evolution in moto helmets. Whether you’re splitting lanes on the freeway or zoned in on the zen of riding, this sleek, stylish DOT and ECE 22.06 certified helmet with an easy gloves-on access Fidlock® chinstrap has been built for adrenaline junkies and city weavers alike. Key Features Injection Molded Polycarbonate Shell - Built for performance combining durability and minimal weight Innovative Ventilation - Featuring 509’s Venturi Venting system that passively wicks sweat and moisture away.Three (3) intake vents and two (2) exhaust vents for optimal airflow → Learn More Dual pane shield for fog-free performance with new shield locks that create the perfect seal Multiple shield options available Built-in breath deflector Rear reflective hits for low light and night riding ITO (Indium Tin Oxide) shield coating to prevent surface scratches and fogging Fidlock® chinstrap App-driven customization, software, and feature updates for Apple and Android WARNING for California Residents Specs Helmet Certifications: DOT & ECE 22.06 Starting weight: 1750g Helmet Size Range: XS - 2X (Intermediate oval fit) Helmet Shell Breaks:Medium Shell - SM, MDLarge Shell - LG, XL, 2X Included Items: 509 Helmet Drawstring Bag and USB C charging cord (wall block not included)