The 3M Metaliks standard safety glasses are made of polycarbonate, are packaged 20 per case, come in clear polished metal and meet ANSI Z87.1-2003, CSA Z94.3 standards. These types of products are designed for specific applications which feature ways of safeguarding & shielding itself and/or the user. This product is designed and manufactured such that it offers the following protection: Anti-Fog, Impact-Resistant, UV-Protective. Provides 99.9 % of UV Protection.