3M Organic Vapor/Acid Gas Cartridge/Filter 60928, P100 Respiratory Protection  (Pack of 2) NIOSH approved for protection against certain organic vapors, acid gases, and particulates 3M recommended for use against radioiodine or methyl bromide Swept-back design allows an enhanced field of view and comfort Bayonet compatibility allows use with many 3M half and full facepiece designs Simple installation and usage requirements reduce training needs