одноразовые рм2,5 индивидуально упакованные north by peel-away маска колодки рм2,5 маска колодки в коробке

air mask fiters anti haze and dustproof disposable mask pad pm2.5 protective breathable replaceable filte 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.