Photochrome Automatische Sonnenbrille Scheibentönung Antibeschlag – Sportbrille Ski Radfahren - Laufen - Golf by Bertoni Italy – F300 – Sport Photochromic Sunglasses by Bertoni Italy: With traditional photochromic lens from clear transparent to grey The material of the frame is shatterproof polycarbonate. The bending of the front frame makes F300 windproof and comfortable. Packing : box . hard case – cord – 4 years of warranty on any structural damages. Bertoni provides lifetime after sale service for all Bertoni goggles and sunglasses.