PM2.5 Filter for washable reusable face mask 5 layer with Activated Carbon

Suit for kind of PM2.5 Face masksSuit for kind of PM2.5 Face masks. Size: Adult: 12x8cm/4.72 x3.15in; in Suit for mouth mask insided with fliter slot. The mask filter provide comfortable protection for people.Suggest replace the fliters every week of uses for the best effect.

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