Summer Up North Patch

Size: 3" x 1.8" 
Iron On - Heat Seal Backing
Great for applying to Hats or Clothing

Instructions:
Fabric like denim and cotton provide the best base for iron-on patches. Don't iron patches onto leather. 

Set your iron to the hottest temperature your fabric can handle (the iron should have different settings for different fabrics.) Do not use the steam setting and make sure there is no water in the iron. 

Iron the area first to make sure there aren't any wrinkles. Place the patch in the position you chose. The adhesive side should be flat against the base fabric. Laty a piece of parchment paper over top to protect the patch and garment. Hold the iroin down with as much pressure as you can for 30 Seconds on the front, and repeat the same for the inside / back of the item to ensure it's secure. 

Wait for it to cool before you check if the glue successfully adhered to your item. 

Youtube will also have lots of example how to videos.