The American National Standards Institute (ANSI) has established standards for impact resistance and materials used in safety glasses for the workplace. This is where the discount Oakley Industrial Collection comes in. The Industrial Collection features our top impact-resistant styles, marked with the appropriate ANSI certifications to designate them as official safety glasses. I’ve been wearing the knockoff Oakley Det Cord sunglasses for over a week, working 10-hour days in commercial construction, and they fit great and provide excellent clarity.