Comfortable material will not rub your face, offering great softness. Perfect for everyday use or outdoor activities, fashionable and breathable to wear. Protects you from dust, pollen, cold, smog, vehicle exhaust and sandy air. Adjustable Strip. It makes it easy to adjust the rope length. Comes with one dust cover and 15 pcs filters. The dust cover is not medical grade masks. Note: Reusable and washable dust cover. You can insert the mask filter along the opening in the mask. Care:Hand wash preferred, machine wash is not recommended. Please wash before using the mask first time and after every use.