Respirator Sanding/Fiberglass For high heat and humidity. Grinding, sanding, sweeping, bagging, fiberglass insulation, and other dusty/hot operations. Cool flow exhalation valve, for easy breathing and cool, dry comfort. M-Nose clip adjusts for comfort. Multi-layer construction with s oft inner shell, provides at least 95 percent filtration efficiency against non-oil airborne particles. Soft braided straps resist tears and won't tangle in hair. Government approved N-95 respirator.