North Safety Products' No. 75FFP100NL pancake filter is a NIOSH approved flexible filter offering P100 protection and 3-in-1 nuisance-level odor relief from organic vapors, acidic gasses and ozone. The filter offers the required protection against Hexavalent Chromium that employers must now provide. Designed to comfortably fit under welding helmets and face shields, it is ideal for use when welding alloys or exotic steel. Combine the filter with North's 7700 half mask to provide extremely low breathing resistance and to reduce worker fatigue.