African American Flags, 2'X3', Printed on ePoly They have an ePoly header and 2 plated grommets. Flags made from 1 ply Economy Polyester (ePoly) are intended for indoor use only. They are a great economic option for flags and have a beautiful display, but the material will wear if left outdoors for extended periods of time. Economy Polyester flags are ideal for events, indoor displays, classrooms, homes, and offices.