NIOSH approved for environments containing certain oil and non-oil based particles. 3M recommended for relief against nuisance levels of organic vapor/acid gases and for ozone protection up to 10X OSHA PEL. Not NIOSH certified for use against ozone. Light blue. Filter Type(s): N\A; Filtration For: N\A; Maximum Room Size (W x H): N\A; Width: N\A.