The HJC C10 Inka MC1SF Matte Black and Red Helmet is vented and tough with a polycarbonate shell. 100871 1The HJC C10 Epik Inka MC1SF full face helmet is the perfect ally for your safety on the road with its ACS ventilation and high quality polycarbonate. 100871 1Discover the incredible aerodynamic ventilation of the motorcycle helmet with ACS technology, keeping you cool and comfortable during the longest rides in any weather.