DOT 3/4 helmet Motorcycle Helmets. Each Helmet comes with it's own beautiful Black pull string bag for storage, which doubles as a cleaning cloth. When not in use just put it back in our the custom fitted pull string bag that we provide absolutely free. An $25.00 value. With years of engineering, the Ventilation and Aerodynamics has been studies over and over again. The shell design has been wind tunnel tested and worn by several racers for comfort and fitting.