The Vitak Civilian Washable Mask is made with 100% polyester fabric with TRIPLE woven layers, one behind the other as one piece. This washable mask is breathable with a high level of filtration due of the effectiveness to its compact weaving that allows filtering of small particles in the air as small as 10 microns*. The polyester fiber of the fabric is Oeko-tex Standard 100 Class 1 compliant. Thanks to the effectiveness of its high-level filtration, the Vitak Civilian Washable Mask helps avoid allergen and dust particles from being breathed in, that could result in diseases of the respiratory tract. Its lightweight design allows it to be worn with comfort.