HJC Helmets 2402-633: Full-Face Street Helmet, C10' MD - The C10 helmets from HJC are all-new competitively priced full-face headgear for riders of all ages who value quality and safety. They offer a lightweight superior fit, thanks in part to their advanced polycarbonate composite shell that was designed using advanced CAD technology. Combined with a wide-view optically superior face shield and their improved "ACS" Advanced Channeling Ventilation system (allowing full front-to-back airflow to flush heat and humidity up and out), the C10 provides a safe and comfortable ride no matter the conditions. Select the size and graphic/color options you prefer.