Textile mask with HEIQ VIROBLOCK - kills microbes on the textile surface. Tested by the Swiss SQTS laboratory. Significantly more effective than untreated masks. Treated with HEIQ VIROBLOCK NPJ03. 3-layer: 2 cotton layers with a fleece filter. The filtration of 85% meets the FFP1 standard. The mask is not water-repellent, as the HEIQ VIROBLOCK coating works on the surface. Features an adjustable nose bridge. 100% cotton. Skin-friendly. Universal size for adults. Washable, up to 30 washes at 40°C. Hand washing is recommended.