other health & beauty items mask safety protection wholesale and retail large-scale source manufacturers

the middle filter layer and the inner layer are composed. the outer and inner layers are made of polypropylene release cloth, and the middle filter layer is made of non-woven fabric the bacterial filtration efficiency (bfe) is not less than 95%; the filtration efficiency of the mask for non-oily particles is not less than 30%. the ventilation resistance is not more than 49pa/cm². storage requirements: it should be stored at room temperature in a clean, dry, ventilated, non-corrosive gas environment, away from fire sources and flammable substances..syi