The fabrics adhere to specifications created by Kaiser Permanente to ensure the most protection possible for a non-medical grade mask. Made from doubled-layered Lycra fabrics, and are machine washable, reusable, and reversable. These masks are assorted colors and do not reflect the colors shown in photo. Designed to fit easily from nose to under chin for secure fit. The most comfortable face masks on the market with a light and highly breathable fabric and the ability to add extra protection with a hidden pocket.