The 75FFP100NL flexible filter from North Safety Products (www.northsafety.com) provides P100 protection and 3-in-1 nuisance-level odor relief from organic vapors, acid gases and ozone . The NIOSH approved fi l ter offer s the protection against hexavalent chromium that shops must now provide. Designed to fit under welding helmets and faceshields, North’s 75FFP100NL is for use when welding alloys or exotic steel. When used with North’s 7700 half mask, the filter provides low breathing resistance to reduce worker fatigue.