ANSI Z87 HD Vision Bifocal Safety Sunglasses for Men and Women. MethaneHD 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 HD Copper Blue Blocker lens wich provides more clarity and sharper view Integrated rubber ear and nose pieces to prevent slippage