Wind tunnel tested aerodynamic, lightweight shell. Injection molded Thermoplastic. One-handed operation for easy opening and closing of chin bar/face shield. Venting system provides precise air control allowing for multiple opening positions. Adjustable top vents and chin vent directs airflow to the left and right rear top exhaust vents. Minimal noise level design. Channeled lightweight EPS liner and cheek pads allows for maximum internal airflow and improved comfort. Wrap around neck roll reduces wind noise. Double "D" ring chin strap retention system easily secures excess chin strap length. Quick and hassle free shield mounting device - no screws or tools required for installation or removal. Seven position positive lock ratchet. Eyeglass friendly optically correct one-piece design with 100% protection form U.V. rays. D.O.T. approved.