Moisture Wicking Stay Cool, Dry Fast Comfortable Adjustable Ear Loops;Washable and reusable;Different Color Internal Layer for Differentiation;Not for medical use. Wash before each use, do not wash in bleach. Do not use on small children or persons with breathing or other medical conditions;Flexible Nose Bridge;Protective barrier helps reduce the transmission of airborne contaminates;One Size fits most;Outer Layer- 86% Polyester, 14% Spandex. Inner Layer- 71% Nylon, 29% Spandex