Made from 100% micro polyester our soft, silky Keep Calm face masks are compact and stretch to fit a wide variety of adult faces. Machine washable with a fold down dual layer these are easy to keep in a purse, pocket or glove box. Easy to breathe in and not restricting. This is not a medical grade mask. Laid flat the mask measures 11 inches from the center of one ear opening across to the other ear opening. The fabric allows for an additional 2-3 inches of stretch.