3M Sanding Respirator with Valve 3M Tekk Protection™ Paint Sanding Valved Respirator #8511PA1. Pack of 1. N95 approved. Use for non-harmful dusts from sanding, grinding, sawing and insulating particles. 3M™ Cool Flow™ Valve technology for heat reduction and easier breathing. NOTE: Always read full user instructions and warnings included with the product before using. Improper use may result in sickness or death.