Bifocal sunglasses with ANSI Z87 Polycarbonate Safety Smoke Lenses. polycarbonate lens Impact Resistant ANSI Z87 Saftey Polycarbonate Smoke Lenses Indestructible Polycarbonate Frames with MemoryFlex Full 180 degree wrap frames to block wind, dust and debris 100% UV400 lenses for maximum sun protection Integrated rubber ear and nose pieces to prevent slippage