N95 Particulate Respirators Plus Relief from Nuisance Levels of Organic Vapor Odors or Acid Gases Added sorbent helps filter out nuisance levels of organic vapors or acid gases. Exhale valve keeps workers cooler. Collapse-resistant, molded Dura-Mesh(®) facepiece is naturally contoured for a comfortable fit. 95% efficient for protection against particulates free of oil up to 10X PEL. Sold 10 per package. Meets 42 CFR84 standard.