GUOER Mask Can Be Washed Reusable Masks Protective Mask One Size Multiple Colors 5 layer activated carbon filer,Non woven+melt blown cotton+activated carbon Masks Replacement Filters,disposable.Recommended replacement of 1~2 times a week Anti haze,Dust, Germs, Allergies,Smoke,Pollution,Ash, Pollen,Gardening,Crafts One size fits most