Reusable Cotton Face Mask 3-ply fabric + filters 1 multi-purpose face mask Up to 99.99% effectiveness against bacteria 99% particle filtration â?¥ 3 microns Certified mask OEKO-TEX CONFIDENCE IN TEXTILES STANDARD 100 The mask has 3 layers (2 in cotton and one containing a filter with the possibility of changing the filter according to your needs). Antimicrobial, antifungal, and antibacterial coating Washable up to 30 times