Sculpted by Speed. Designed and developed for Professional MotoGP athletes where going FASTER and being PROTECTED is the goal. By minimizing drag and ensuring optimal aerodynamic stability, air management outside and inside of the helmet, and a comfortable, customizable fit, the S-R10 enhances the overall experience in racing and sport riding. The Alpinestars Supertech R10 is the Pinnacle of Alpinestars racing helmets. Outer Shell: Utilizes molding technology with a multi-composite combination featuring a 3K high-density carbon outer layer, a uni-directional carbon composite layer, an aramid fiber layer, and a fiberglass one. 3K high-density carbon outer layer provides strength and efficiency of energy dissipation over the shell.