Recommended for substance specific particle exposures up to 10x OSHA PEL for lead, cadmium, arsenic, and others 3MTM Cool FlowTM Exhalation Valve is a one-way valve offering easy exhalation for cool, dry comfort Faceseal is comfortable to wear and contours easily to help provide a good seal Adjustable noseclip provides a custom fit, secure seal, and reduces the potential for eyewear fogging Lightweight construction contributes to increased wear time Buckle adjustable straps provide a comfortable, secure fit with a single tug.Includes:Foam Faceseal