What is the difference between FFP2 and KN95?

What is the difference between FFP2 and KN95?

The European Union's mask testing standards include non-oily and oily substances, and sodium chloride and paraffin aerosols are used for testing. That is to say, the EU standard masks actually have both non-oily particulate matter and oily aerosol protection, while the national standard masks are divided into One of the two is KN type as non-oily protection, KP type only supports oily protection.