HOW TO STICK ON A PATCH: 1. Peel off the sticker backing of the patch and apply to any flat surface like a phone or laptop. 2. Press down onto the patch for 15 seconds to ensure they stick. 3. The patch can also adhere temporarily to the fabrics without using a clothes iron for the first time. To increase the adhesion, using the clothes iron to iron the patch on and then use a needle thread to sew the patch on the clothing. HOW TO IRON ON A PATCH: 1. Put the patch in the desired position, and preheat the iron to the hottest setting your fabric can tolerate. Do not use water or steam. 2. Cover the patch with another cloth to protect the patch. 3. Press down the iron for a while with pressure. 4. Turn the clothing inside out and repeat ironing several times on the back. 5. Remove the iron and allow the patch to cool. 6. Repeat the above steps if needed to ensure the patch is secure. 7. If you want the patch to be more secure, you can sew along the side of the patch. Do not iron the patch on unironable fabrics (low melting point) such as nylon, vinyl, polyester, cordura or leathers. You could sew the patch directly on these fabrics.