Alpha Pro Tech Critical Cover® PFL® N-95 Particulate Respirator The Positive Facial Lock (PFL) N-95 Particulate Respirator meets the World Health Organization (WHO) and the Centers for Disease Control (CDC) recommended protection levels (where applicable) for many airborne contaminants. NIOSH-certified, the N-95 delivers the appropriate amount of filtration efficiency and when combined with a trio of patented and unique design features, also delivers the user a comfortable, fluid-resistant, custom fitting facemask. The integrated Magic Arch® technology creates a breathing chamber within the facemask by holding it away from the wearer’s nose and mouth. The PFL technology, incorporating an integrated Twist Seal® chin piece, helps the wearer create a perfect fit every time. One size. Not made with natural rubber latex. 35/pk.