Designed for applications such as welding, soldering and other operations where metal fumes may be present including those with ozone and nuisance level organic vapors. This respirator is designed for applications such as welding, soldering and other operations in which metal fumes may be present, including those present with ozone (3M recommended for 10 x OSHA PEL) and nuisance levels of organic vapors (below OSHA PEL).