The KN95 industrial dust mask can provide novel Coronavirus protection. The N95 medical protective mask and KN95 industrial dust mask have the same protection. The average diameter of the filter particles in the KN95 test was 0.3μm, with a 95% success rate. Novel Coronavirus viruses are very small in diameter and remain in the air as aerosols. N95 masks have good resistance to aerosols, so in theory they can be used against novel Coronavirus viruses and therefore are considered standard protective masks in the event of an outbreak. The difference between KN95 industrial dust mask is that N95 medical protective mask has the function of blocking liquid splashing. The outer surface of the mask has a layer of hydrophobic protective layer. The main role is to protect slight liquid or blood splashing and infiltration, while industrial dust mask has no hydrophobic protective layer.