This 3D 2-Layer Ice Silk Mask is made from 180gsm Polyester and Spandex and is reusable and machine washable. Its pleated center and soft, stretchy and breathable material make it comfortable to wear and easy to breathe in while wearing. With its 5″ x 7 3/4″ size and stretch ear loops, one size fits most.  Black edging and ear loops. Each mask includes an ear-saving mask extender. Not certified for medical use.