The 3M Tour-Guard over the glass (otg) safety glasses are made of polycarbonate, are packaged 20 per box, 100 per case, come in clear and meet ANSI Z87.1-2003, CSA Z94.3 standards. Proper sizing is important when buying this part. The size for this product is Small. 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: Impact-Resistant, UV-Protective. Provides 99.9 % of UV Protection.