SINGER-Iron-On Mending Fabric. A 7x6 inch patch of iron-on mending fabric. Color: white. Low heat for permanent press and other fabrics. 100% cotton. Use dry iron only; no steam. Washable and super sealing for mending and decorating shirts, jeans, skirts and jackets. Not recommended for use on nylon, rayon or fabrics made of monofilament polyesters.