KN95 masks are A Chinese replacement for N95 masks, and the US Centers for Disease Control (CDC) said KN95 masks are as effective as N95 and are one of the “appropriate alternatives”, BuzzFeed reported. According to 3M, the world’s largest maker of masks, KN95 is “equivalent” to N95 masks and “can be expected to function very similarly”.
Mask is a kind of hygiene products, generally refers to wear in the mouth and nose to filter the air into the mouth and nose, in order to prevent harmful gases, smells, droplets, viruses and other substances, made of gauze or paper.
Masks have a certain filtering effect on the air entering the lungs. Wearing masks has a very good effect during the epidemic of respiratory infectious diseases and the operation in the polluted environment such as dust.