3M™ Combination Filter CF22 A2P3 R D DT-4031E* Suitable for use with certain 3M™ half and full-face tight-fitting respirators in negative-pressure mode, as well as 3M™ Powered Air Respirator System PF-600 Series* Protects against particulates and organic gases and vapours* Protects against organic gases and vapours with a boiling point above 65°C* Protects against a range of particulates:Solid and liquid particlesToxic and radioactive particlesMicro-organisms (e.g., bacteria and viruses)Enzymes* A2 classification when used in negative pressure mode* A1 classification when used with approved powered air systemsEN 14387:2004:2008