Description:Passive ventilation INCREASES air circulation and helps keep the interior glass dry and not fogged. Clamping system is designed for optimum ANATOMICAL ADAPTATION face shape. Silicone liner NA fixing strips guarantee perfect fastening helmet. All filters are provided with a special layer to fog and special varnish increases the scratch resistance. PROTECTION moisture formation inside the glass. Photochromic GLASS FOR EXCELLENT VISIBILITY FOR ANY WEATHER.