The SCOTT Hustle X MX Enduro Goggle is paired with a ventilated double ACS (Air Control System) lens in order to ensure high performance and avoid fogging. This goggle is best suited for extreme riding conditions where temperatures range from the highest of highs to the lowest of lows.FRAME TECHNOLOGIES:2-Layer face foam.No-slip silicone strap.LENS TECHNOLOGIES:SCOTT Truview double lens.ACS Air Control System.NoFog™ Anti-Fog lens treatment.