High-quality materials: High-quality cotton filters, non-woven fabric, large filter area, high air permeability, low breathing resistance, quiet breathing. Safety and protection: Cotton filters with 5N11CN insert filter, cotton filter and replaceable cartridges give it a long service life. Material characteristics: Electrostatic material filter cotton adsorbs and filters substances with a mass diameter of 0.3 microns or more. Compatibility: The kit contains filters for other compatible 3M filters 6000, 6200, 7502, 6800, 7501, FF402, for industrial environment or maintenance, cleaning, polishing, welding, sawing and grinding. Easy to wear: The full face mask filter is intended to be combined with 3M gas filters, high wearing comfort, quick and easy filter assembly, always sitting correctly allows regular breathing. Pack of 60 filters 3M cotton filters, full face mask filter, insert filter 5n11 CN, filter cotton for filters 6000, 6200, 6800, 7501, 7502, FF402. Features: High quality