Reusable Hygienic Mask. Made of Cotton & Polyester Double Layer. Fabric Processed with Heiq Viroblock Npj03 Technology, a High Efficiency Treatment Proven to Neutralize Bacteria & Viruses, Covid-19 Included. with Ergonomic Front Stitching for a Comfortable Fit & Elastic Ear Bands in Hypoallergenic Fabric, with Oeko-tex Class I Certification. Presented in an Individual Bag. for Personal Use by Adults. Certified by Eu Notified Body & Manufactured According to Une 0065 Specification. Finishing & Durability According to the Cwa 17553 Standard Treatment Properties Analysed According to Iso 20743: Determining the Antibacterial Activity of Textile Products & Iso 18184: Determining the Antiviral Activity of Textile Products. Aditive Heiq Viroblock Npj03, Certified as Safe & Sustainable, All Components with Cosmetics Grade, Bio-based & Recycled. Bacterial Filtration Efficiency: = 90%. Highly Resistant, Up to 25 Washing Cycles. a Minimum Washing Temperature of 60°c is Recommended. Outside: 50% Cotton & 50% Polyester. Inside: 100% Cotton Minimum Quantity: 100.