NIOSH approved when used with gas proof goggles or the Moldex 9000 full face. For use against particulates when no oil is present use with 8910 N95 Pre-Filter and 7020 retainer. For use against particulates when oil is present use with 8970 N95 Pre-Filter and 7020 retainer. For contaminants that fall under an OSHA substance specific standard requiring a high efficiency particulate air (HEPA) filter use with 7940 P100 filter disk and 7920 Piggyback adapter.