Features: - Organic Vapor & Acid Gas with P100 (Organic Vapor, Sulfur Dioxide, Hydrogen Chloride, Chlorine, All Particulates) - NIOSH Approved - APF 10* when Qualitative Fit Testing is performed with either half mask or full facepiece (see spec sheet for more details) - APF 50 ...Features: - Organic Vapor & Acid Gas with P100 (Organic Vapor, Sulfur Dioxide, Hydrogen Chloride, Chlorine, All Particulates) - NIOSH Approved - APF 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 Specs: - 100% Kevlar - 13 Gauge - Light Weight