KN95 Protection mask, black, regular size. Suitable for respiratory protection, filtering dust, haze, bacteria, droplets, and other harmful particles in the air. FDA approved a triple-layer respirator face mask, rated to capture 95% of tiny particles (0.3-micron particles, to be exact). KN95 masks are used by medical professionals around the world to prevent incoming pathogens. To be certified as a KN95 mask manufactures run mask fit tests on real humans with ≤ 8% leakage. These masks feature one-way air valves to assist with better airflow and have a flow rate of 85 L/min