3M? Cool Flow? Exhalation Valve is a patented one-way valve offering easy exhalation for cool, dry comfortFaceseal is comfortable to wear and contours easily to help provide a good sealAdjustable noseclip provides a custom fit, secure seal, and...
3M? Cool Flow? Exhalation Valve is a patented one-way valve offering easy exhalation for cool, dry comfortFaceseal is comfortable to wear and contours easily to help provide a good sealAdjustable noseclip provides a custom fit, secure seal, and...