VFE (Viral Filtration Efficiency) 99% . PFE (Particle Filtration Efficiency) 99% . BFE (Bacterial Filtration Efficiency) 99% . Suitable for high protection range: . hospital. clinic. public transport. Where the crowd gathers . It is also suitable for chronic patients and people with low resistance to enter and exit public places and is the first choice for medical staff . Use high-efficiency filter paper to effectively prevent 99% droplets from spreading . Strong barrier smog. PM2.5. virus. bacterial . Size: about 17.5 cm x 9.5 cm
