3M™ Secure Click™ Organic Vapor/Acid Gas Cartridge D8003 is NIOSH-approved to help provide respiratory protection against certain organic vapors, chlorine, hydrogen chloride/sulfur dioxide, or chlorine dioxide or hydrogen sulfide. The D8003 organic vapor/acid gas cartridges are for use with 3M™ Secure Click™ facepieces. Secure Click™ cartridges utilize dual flow technology for easier breathing.