The 3M Nitrous standard safety glasses are made of polycarbonate, are packaged 20 per case, come in bronze silver and meet ANSI Z87.1-2003 standards. These types of items are designed for specific applications which feature ways of safeguarding & shielding itself and/or the user. This item is designed and manufactured such that it offers the following protection: Anti-Fog, Impact-Resistant, Scratch-Resistant, UV-Protective. Provides 99.9 % of UV Protection. This part comes with the following: Neck Cord, Soft Pouch.