As one of the non-woven masks, strap-on non-woven masks are more flexible, and the degree of wearing tightness varies from person to person. The material is made of pure cotton absorbent gauze or knitted fabric with non-woven fabric in the middle, which has good filtering effect but poor air permeability. In terms of latest non-woven mask, the surface layer is non-woven fabric, and the middle is the filter layer. Melt blown cloth is generally used as the filter layer, which has strong air permeability, good filtering effect, and sterilization effect.