'Strideline' Mask. Adult Sizes one size fits most. Available in Three Patterns Green and Gold Raspberry Red and Multi-Colored Floral. 45% Polyester 45% Cotton 5% Elastic and 45% Spandex. Wash by lathering in soap and warm water for at least 20 seconds and hang dry. Do not put in dryer. This facemask is made to cover a person's mouth and nose to contain that individual's respiratory secretions and is not a piece of medical grade Personal Protective Equipment.