in stock ce certificate kn95 face masks activated face cover mask n95 protect mouth face mask protective anti-bacterial mascherin

main ingredient:non-woven fabric,meltblown fabric,air cotton. filtration efficiency:non-oily particulate matter filtration rate more than 95%. product storage:storage temperature : 20 degrees-38 degrees,storage temperature less than 83%.its should be stored in a well-ventilated,dark and dry enviroment and away from fire sources and pollutants. validity:three years.