【COD】10pcs face mask original facemask disposable KF94 Face mask level 3Layer fda approved Non-woven Protection Filter 3D Anti Viral Mask Others Korean style washable

Particles Filtration Efficiency(PFE): >= 95%
Bacterial Filtration Efficiency(BFE): >= 95%
Inspiratory resistance: < 350
Expiratory resistance: < 250
Layers and Materials: First Layer(Outer Layer): Non-woven fabric
Second Layer: Melt blown cloth