All-new insulating, linen/cotton blend Homespun Curtain Panels have not one but two linings: an inner-face lining of knitted polyester flannel and a white backing of brushed 100% polyester. This soft, substantial blend of materials is like a blanket for windows with a heavy drape and super draft-blocking, sun-shielding properties that will help maintain a constant room temperature year-round. Metal grommets. Imported.