горячая одноразовая маска pad рм2,5 нетканые ткани маски заменяемые слоев для рм2,5 прокладку фильтра с активированным углем лица protective

hot disposable mask pad pm2.5 non-woven fabric mask-replaceable layers for face protective products features: 1.the first layer: high efficient filter cloth filter the dust of micron. 2.the second layer: meltblown cloth to filter industrial pollutants, automobile exhaust, second-hand smoke pollen allergies. 3.the third layer: high efficient filter cloth filter benzene and a smaller function of filtering dust microns. 4.the fourth layer: activated carbon cloth filter density, sma.