3M Particulate respirator. The N95 classification means 95% of particles down to 0.3 microns are screened out. Please observe manufacturer recommendations regarding usage. Features: Cool Flow Exhalation Valve: Patented one-way valve for easy exhalation & cool, dry comfort. M-Noseclip: Adjusts easily for fewer pressure points and greater comfort. Electret Media: Advanced electrostatically charged microfibers help make breathing easier & cooler.