Mask measures 7" wide by 4" tall (with pleats collapsed), excluding ear loops. Sublimated polyester exterior with a soft microfiber lining for added comfort and improved fit - pleats allow the mask to expand for increased coverage and adjustable sliders on the elastic ear loops keep everything securely in place. Lining allows for insertion of additional mask or filter - not included - between layers as desired. Elastic loops are 63% polyester, 37% latex. Printed and assembled in the USA, machine washable