Bertoni Sports Photochromic Sunglasses for Bike Cycling Running Golf Fishing by Italy &ndash; F300 Frame: shatterproof polycarbonate - These Sunglasses adapt to changes in light thanks to their photochromic lenses. Lens: photochromic polarized from clear grey to dark grey in only 8 sec. Lens: 100% UV Protection - interchangeable in order to clean it very quickly and easy Wraparound design: protects the eyes from wind, splashes and bad weather, provide enhanced peripheral vision - Size: suitable for all types of faces (narrow to large) Free Expedited Shipping - Bertoni provides lifetime after sale service for all Bertoni goggles and sunglasses