The Positive Facial Lock N-95 Particulate Respirator meets the World Health Organization and the Centers for Disease Control recommended protection levels for many airborne contaminants. NIOSH Certified, it 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, custom fitting facemask. The integrated Magic Arch technology creates a breathing chamber within the facemask by holding it away from the user's nose and mouth. The PFL technology, incorporating an integrated Twist Seal chin piece, helps the wearer create a perfect fit every time.