The 75FFP100NL by North Safety Products is a NIOSH approved flexible filter offering P100 protection and 3-in-1 nuisance-level odor relief from organic vapors, acid gases and ozone. The 75FFP100NL offers the required protection against Hexavalent Chromium that employers must now provide. Designed to comfortably fit under welding helmets and faceshields, North's 75FFP100NL is ideal for use when welding alloys or exotic steel.