anti dust mouth cover masks with breathing valve red

the protective mask with breathing valve of protection effectively resist the invasion of harmful substances, protecting against dust, liquids and weather. durable, breathable, reusable after washing the mask can be reused many times, and even cleaning for many times will not reduce the mask dust rejection rate. please do not wash the mask filter. independent one-way breathing valve effectively reduces breath resistance. seal the bridge of the nose improves the adhesion of the item.