Stanley Multi-Contaminant MC/P100 Multi-Purpose Respirator (RST-64029) Latex-free, soft, non-allergenic elastomer and silicone blend for snug on-the-job protection Contoured sealing flange helps eliminate pressure points on face for comfortable all-day wear Strategically engineered exhalation valve placement allows more breath to be exhaled faster, making the mask more comfortable and cooler to wear Cartridges and filters are replaceable so facepiece can be re-used NIOSH-approved MC/P100 protection