Reusable hygienic mask. Made of cotton and polyester. Materials with HeiQ Viroblock NPJ03 technology, a treatment with proven high effectiveness in neutralizing bacteria and germs. With ergonomic front seam for a comfortable fit and comfortable elastic ear bands in hypoallergenic fabric, with OEKO-TEX Class I certification. Individually bagged. Graphene Free. For adult personal use. Tested and manufactured according to European standard UNE-CWA 17553:2020. Treatment properties analyzed according to ISO 20743: Determination of antibacterial activity of textile products and ISO 18184: Determination of antiviral activity of textile products. HeiQ Viroblock NPJ03 additive, certified as safe and sustainable, with all components cosmetic grade, bio-based and recycled. Bacterial filtration efficiency: ≥ 90%. Highly resistant. Washing at 60°C is recommended.