3M? Cool Flow? Exhalation Valve is a patented one-way valve offering easy exhalation for cool, dry comfortM-Noseclip adjusts easily for fewer pressure pointsProvides a custom fit, secure seal, and reduces the potential for eyewear foggingLightweight...
3M? Cool Flow? Exhalation Valve is a patented one-way valve offering easy exhalation for cool, dry comfortM-Noseclip adjusts easily for fewer pressure pointsProvides a custom fit, secure seal, and reduces the potential for eyewear foggingLightweight...