This product consists of three materials: non-woven, nose band and elastic band.The surface of the mask is divided into inner, middle and outer layers.The inner layer is ordinary non-woven fabric, the middle layer is super-fine polypropylene melt-blown fabric, and the outer layer is non-woven fabric or super-thin polypropylene melt-blown fabric.The mask strap is made of an elastic band, which is made of non-woven fabric with an elastic band inside.The nose strip is metal strip, which contains fine wire plating.