TotalBoat N95 Disposable Dust Mask with Exhalation Valve 10-Pack Adjustable noseclip for creating a tight and custom seal to the users face for maximum protection. Efficiently filters 95% of airborne particles with its N95 NIOSH approval rating. For sanding, sawing and sweeping materials like wood, fiberglass, drywall, & painted surfaces. Premium exhalation valve prevents heat, moisture buildup and safety glasses fogging up. Economical and functional alternative to 3M 8511 masks and other N95 respirators. 10 masks per box.