Face Mask PM2.5 Activated Carbon Filter for Breathing Insert Protective Mask Anti Pollution Washable

This face mask is an ideal for running, walking, jogging.The breath dust mask is made of high-quality nylon material that is moisture-wicking and very breathable, comfortable.Employs an adjustable strip on the outside across the bridge of the nose that can be bent for a custom fit.Dual one-way breathing valve can discharge excess exhaust gas and water vapor, which keeps breathing smooth. It is especially useful for those who need to wear a mask for hours at a time.Reusable for about 3-12 months depending on air quality conditions. The mesh dust mask shell and valves can be washed when they get dirty, the filter is replaceable. once a month change is recommended. The extra 4 filters are ready for you and can be replaced at any time.