These machine washable masks are made for comfort and long-time wear. With soft elastic straps around the head, your ears can live comfortably over a full shift. Made to fit the curvature of the average human face, sit flush against the skin and cup underneath the chin. 4 layers of light cotton blend fabric offer optimal filtration and comfort. These masks are not FDA-cleared. Please note these are not a replacement for medical grade N95 masks or PPE, but are meant to help