Kask Helmet - Protone IconRedefined Greatness A new synonym for victory, the Protone Icon helmet features the latest technological advances in safety, ventilation, and aerodynamics to make it an icon of road cycling. The Protone Icon takes its design from KASKs winning Protone helmet and has improved upon it in every way possible. A redesigned internal frame gives the wearer greater safety. Seamless technology joins the lower and upper parts of the shell to give it a refined,