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50/100Pcs Black KN95 Face Mask 5 Layer BFE 95% Disposable Respirator with Valve

50/100Pcs Black KN95 Face Mask 5 Layer BFE 95% Disposable Respirator with Valve

10/30/50/100 Pcs KN95 Protective 5 Layers Face Mask BFE 95% PM2.5 Disposable Respirator. What is a KN95 mask?. KN95 mask with filter. The material of the dust mask must be non-irritating and non-allergenic to the skin, and the filter material is harmless to the human body.