Reusable hygienic mask. Made of cotton and polyester double layer, with ergonomic front stitching for a comfortable fit and elastic ear bands in hypoallergenic fabric, with OEKO-TEX Class I certification. For personal use by adults. Certified by EU Notified Body and manufactured according to UNE 0065 specification. Bacterial filtration efficiency: > 98%. Highly resistant, up to 25 washings. A minimum washing temperature of 60°C is recommended.