Arai Signet-X Helmet - SolidsPurpose built for the street. A new benchmark in comfort, quiet, stability, and ventilation. Arai applied the same tireless 24 7 focus devoted to our race helmets to designing it, refining and adapting proven concepts to a new purpose. On the long, narrow end of the head shape spectrum, the Signet series has always been the "go to" helmet of choice. The new Signet X exemplifies that shape in a feature rich package. Arai is the only company offering