Will A Class Of Nearly Every American Will Be Created In PFAS Case? Lawyers will soon move ahead with plans to certify a class action lawsuit that fails to allege anyone has been made sick by a class of chemicals collectively known as PFAS, according to a report in Legal Newsline. Kevin Hardwick is seeking to represent a class of people exposed to PFAS, not injured by it. The case against 3M and other defendants is notable in that almost everyone in the country might end up a member of it. PFAS is a class of chemicals that were used in products like non-stick cookware, firefighting foam and other products.