This patch can be ironed onto fabric like shirts, jeans, etc. However, please do not iron the patch onto leather, rainwear (waterproof), highly elastic, rayon, nylon, or triacetate fabrics that cannot withstand heat since this can scorch and damage it. This patch can be applied to any material by stitching. Also, do not remove the plastic heat-sealed backing when sewing on the patch. You'll damage the patch if you do so. IRON ON INSTRUCTIONS 1.Preheat the hand iron to the hottest setting (no water or steam should be used during application). 2.Put the patch where you want it and cover it with a pressing cloth, like a handkerchief, sheet, or pillowcase. 3.Press firmly with the iron straight down for 35-45 seconds. 4.Turn the garment inside-out and repeat steps 2 and 3 by ironing on the reverse side. 5.Wait for the patch to cool before testing it. Once the applied patch is permanently attached to the garment, it is washable, dryable, and dry cleanable. For machine washing, turn the garment inside-out before washing and drying.