F308CR The Best Italian brand of sunglasses is finally here - Bertoni! F308CR Frame Color: Silver Chrome - Pearl White Lens Color: Photochromic from Brown to Grey Mount Material Grilamid is a special Nylon studied for frames used in sport activities. It offer extreme streitgh although it is light and flexible adapting itself perfectly to the face. It has a "memory" which keeps it shape and elasicity even in extreme temperatures. Features: Tipe of Lenses Anti-fog photochromic : When exposed to UV light, the lenses tend to darken (depending on how bright the light is), giving the best visual performance and protecting your eyes no matter what type of weather. The lenses are treated with a special resin which removes the condensation which forms on the surface of the lens when passing from hot to cold. For more info visit: http://www.bertonieyewear.com