www.safetyandhealthmagazine.com/articles/safety-sunglasses-3

Safety sunglasses

January 1, 2011
The Black Ops Brick sunglasses bear the official mark of ANSI Z87.1-2003 certification, meaning the unbreakable matte black nylon frames can withstand punishment such as the impact of a 0.25-inch diameter steel ball fired at 150 fps from 20 different angles. They provide 100 percent UVA/UVB protection, as well as a facial seal that keeps out debris and dust.
Wiley X