St 501 is the new full-face helmet dedicated to touring and sporting use, with a strong racing soul. The external shells, made using HPC (High Performance Composite) technology and available in two different sizes, together with the internal EPS ones in 4 different densities, guarantee high safety standards whilst maintaining a low weight. The modern lines and aerodynamic design make it perfect for getting lost on the asphalt even in the hottest months, thanks also to the ventilation system, which guarantees excellent internal climate control in any circumstance. Equipped with stop-wind and a large internal sun visor, combined with the Pinlock® lens, it is able to give you all the safety you need. Lightness and protection merge with a design that stands out from the pack in the new Airoh f