N7580P100 Gives the same P100 protection in a 45 percent thinner, 60 percent smaller size. Its compact, lightweight design leads to less visibility obstruction and facilitates usage in tight spaces. Fits under welding helmets and other face gear. Attachable as a prefilter to all North chemical cartridges. Approved for respiratory protection against dusts, fumes, and mists having a time-weighted average less than 0.05 milligram per cubic meter, asbestos containing dusts and mists and radionuclides. Sold as a pair.