PM2.5 mask refers to a mask that can effectively filter PM2.5 particles. The tightness of the mask determines the ability to filter suspended particulate molecules. Can effectively filter invisible killers in the air-smog, viruses, bacteria, dust mites, pollen and other tiny particles. Suitable for environments with poor air quality. The basic structure of the PM2.5 mask is that the outer layer is an antibacterial fabric, and the material is carbon fiber felt, polymer fabric, non-woven fabric, etc.