Protect yourself from harmful dusts with the Safety Works Toxic Dust Respirator. This respirator features a comfortable, flexible face piece and lightweight cartridges for an unobstructed view of your project. The high-efficiency filters are pleated for extra surface area, adding long life while filtering 99.97% of dust 0.3 microns and larger. It is approved by NIOSH under the NIOSH 42 CFR 84 Respirator Certification Regulations and for the P100 Filter Classification.