Breed BSG007BK Hardwell Sunglasses, Black All of Breed sunglasses are polarized and we use the Triacetate Cellulose (TAC) polarized process. The TAC process uses a multiple layer production. Titanium Frame Polycarbonate Lens 100% UV Protection  Polarized 43 mm Lens Width 15 mm Bridge size 136 mm Temple size Spring Loaded Hinges