Z87 Yellow Safety Bifocal Glasses ANSI Polycarbonate Lenses. polycarbonate lens Impact Resistant ANSI Z87 Saftey Polycarbonate 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