Multi-Gas with P100 (Ammonia, Chlorine Dioxide, Chlorine, Formaldehyde, Hydrogen Chloride Hydrogen Fluoride, Hydrogen Sulfide, Methylamine, Organic Vapor, Sulfur Dioxide All Particulates)NIOSH ApprovedAPF 10* when Qualitative Fit Testing is performed with either half mask or full facepiece (see spec sheet for more details)APF 50* when Quantitative Fit Testing is performed with full facepiece only (see spec sheet for more details)Safety Works cartridges and filters are only compatible with Safety Works Half Mask and Full Facepiece.