Assuming you are referring to the 3M 8511 N95 mask, yes this mask is good for Covid. It is rated N95 by the NIOSH and offers 95% filtering of airborne particles. This means that it can filter out at least 95% of all types of harmful particles in the air, including viruses like Covid-19. The mask also features a nose clip and adjustable straps for a secure fit, and an exhalation valve to help reduce heat build-up inside the mask.