North’s 75FFP100NL is a P100 low-profile flexible filter offering protection from nuisance-level (below the PEL) odors of organic vapors, acid gases and ozone in a single pancake style filter. Designed to fit comfortably under welding helmets and faceshields, the NIOSH-approved filter has an extremely low breathing-resistance and is ideal for use while welding alloys and exotic steel. North Safety Products, Cranston,