Toxic Dust Respirator, Half Mask, NIOSH P100, Flexible Face Piece For Better Seal, Low Profile Cartridges For Unobstructed View, Ideal For Working Near Lead Or Asbestos Dust Or For Soldering, Features A Comfortable, Flexible Face Piece & Lightweight Cartridges For An Unobstructed View Of Your Project, High Efficiency, Pleated For Extra Surface Area Adding Long Life While Filtering 99.997% Of Dust 0.3 Microns & Larger, Approved By NIOSH Under The NIOSH 42 CFR 84 Respirator Certification Regulations & For The P100 Filter Classification, For Replacement Cartridges Use SWX00324.