Polaroid invented the first synthetic polarized lens and set the standard. Why not buy the original, most efficient polarizer on the market? 100-percent UVA/UVB/UVC protection 7-layer lens construction S-13 polarization Flexible Shatter resistant Hard case and cleaning cloth included Available in silvertone frame/brown lens color options Metal frame, polycarbonate lens Clean with soft cloth Made in China Model number 4231b Imported