PM2.5 mask refers to a mask that can effectively filter PM2.5 particles. The tightness of PM2.5 mask determines the ability to filter suspended particles. PM2.5 mask can effectively filter the invisible killer in the air-haze, virus, bacteria, dust mite, pollen and other small particles. PM2.5 masks are suitable for environments with poor air quality. The basic structure of PM2.5 mask is an antibacterial fabric on the outer layer, made of carbon fiber felt, polymer fabric, non-woven fabric, etc.