HOW TO IRON ON PATCHES1.Check the fabric patches with hot glue or simple cloth on the back.If cloth back, you should sew on.If hot glue backing, please see below instructions.2. Make sure your clothing material.Denim and cotton is perfect for ironing.If polyester fabric, be careful to be burn or discolored.If silk or nylon luggage case, please don't.3.Place your heated iron on garment firmly for 10 seconds to make more .4.Cover the patch with a thin towel.5.Set your heat seal machine to 350 degrees,Press the iron down for 20 seconds,Increase temperature to 375 degrees. Turn the garment inside-out and press for 15 more seconds.6.Remove the iron and allow the patch to to cool.If lifts a bit, repeat step 5.7.Consider sewing around the edges. NOTE:Iron-on patches are meant to be permanent, but they do become loosened over time. Take care not to let the article get too dirty, since washing it may cause the patch to start coming off.If you do need to wash the item, hand wash it using cold water. Allow it to air dry.