... any toxic, irritating stimulant, poison. 3. Adjustable nosepiece and inner foam provide a custom seal for different facialsizes.4 ... . Special 4-ply pleated design, high filtration and static electricity material,high efficient active carbon cloth to ... ink, dyeing, aotu building, shipsbuilding, electronic, food manufacturers processing, environmental sterilizing,and worse workshops. FFP2 Mask