Instructions for Iron on: 

(1) Place the patch directly onto the garment where you are going to fix it.

(2) Cover the patch with a thin piece of cloth.  (Avoid using the iron directly on patch).

(3) set you iron to cotton "no steam"

(4) Keep pressing the iron for around 40-60 seconds and temperature at  approx 120-150 (depending on the thickness of the cloth)

(4) Wait for it to cool down.