How to apply an iron-on patch:

1. 1. Heat up your iron. You want your iron to be on its highest heat setting in order for the patch to properly adhere to the clothing. If you don’t have an iron, you can use a hair-straightener in a pinch!
2. 2. Plan your design. Lay out your piece of clothing on the ironing board and place the patch in the spot where you want to adhere it. The adhesive side (i.e., the side without the design) should be flat against the fabric. If you’re ironing it on shoes or a hat—or other things that don’t lie flat—stuff the insides with towels. (This way, when you press on the patch with an iron later, it is as close to the fabric as possible and doesn’t shift around.)
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3. 3. Place a thin cloth over the front of the patch. This will act as a barrier between your patch and the iron to protect the fabric of your clothing from the heat. You can use a pressing cloth for this, but a pillowcase or damp towel will suffice.
4. 4. Iron on that patch. Place the iron over the patch and cloth and hold it there for 30 seconds. If your patch comes with specific instructions for how long to hold the iron on it, do that amount of time instead.
5. 5. Flip and repeat steps 3 and 4. Once the patch is fixed to your clothing, turn it inside out and lay it flat on the ironing board again. Place your pressing cloth or pillowcase over the backside of the patch and repeat step 4. If you’re ironing them on something that’s difficult to flip inside out (e.g., the front of a sneaker), apply the iron directly on the patch for a second round.