tHE Bolle King frames feature b-20.3 polycarbonate lenses, which are made from premium grade resin, resulting in a lens that is 20 times more impact resistant than glass and 3X lighter. Additionally, the lenses are polarized for a crystal clear view at all times. FEATURES: Color: Shiny Black Lenses: b-20.3 Frame Material: b-88 Nylon Lens Material: Polycarbonate Lens Color: Grey Polarized: Yes Fit: Large Bolle Tennis Accessories 10997