If you have ordered custom iron on patches no minimum and want to apply them on your clothes. For an embroidered patch, you have to set the temperature setting to either cotton or high heat. Preheat that specific area of the garment where you will place the patch. Do not press the iron directly on the garment. Use some other piece of cloth and put it in between the iron and your garment for extra protection. You just have to press the iron firmly for a few seconds, and the job is done. The extra cloth that you put on the embroidered part of the patch protects its thread from burning.