N95 Valved and Non-Valved Particulate Respirators are designed to help provide quality, reliable worker respiratory protection. The respirator has a dual head strap for optimum fit. Its unique design follows the contour of the face, while the valve enables easy breathing and comfort. Maintenance-free, this respirator provides 95% filter efficiency level effective against particulate aerosols free of oil; time use restrictions may apply. NIOSH approved.