N95 level: filter efficiency up to 95%. Reduce the risk of inhaling harmful gases, bacteria, viruses and other harmful particles.Peace of mind: The built-in filter can effectively separate PM2.5 fine particles and bacteria and viruses. Reduce viral infections in the population.Comfort: Prolonged wearing will not irritate. Adjustable soft nose clips provide a comfortable and secure seal. Comfortable elastic ring, no pressure on the ears. Wide enough to cover adults' noses, mouths and faces.