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3pc 3 layers health cycling anti-dust cotton mouth face mask respirator men women specification: 100% brand new and safety particle respirator home 3 layers,very thick,outer layers are made from high grade cotton,middle layer used activated carbon material,anti-dust,anti-poison,anti-odor; washable and reusable ergonomic cut on nose detial and ear loop adjustable buckle for closely fit; high elastic ear loop mouth-mask is wide enough for cover nose,mouth and face,very comfo