SHOEI X-FIFTEEN Proxy HelmetSHOEI X FIFTEEN Proxy Helmets THE TRUE RACING HELMET Aiming for even greater heights, the completely new design X Fifteen was born through long term research and wind tunnel experiments. The X Fifteen, which is thoroughly committed to contributing to the rider's victory, will create a new wind in the racing scene. Aeroform Shell Design: Experience advanced aerodynamic performance born from racing Based on SHOEI's know how and the pressure analysis