You Never go Full Retard Patch measures 4x2.5 inches and is Embroidered in Black / Green. The patch can be sewn on to Leather Biker Jackets, Vests or Chaps. The patch can also be ironed on to Shirts, Hats or Denim material such as Jeans. Features plastic iron on backing and clean laser cut embroidered borders. Japanese made iron on glue requires temperature between 270-290 Degrees Fahrenheit. Use a heat press for 30 seconds to adhere the patch permanently to your clothing. Using a regular household iron will probably not be as permanent as one hopes. If possible we recommend you sew on your patches for a more durable application. Never iron on patches to Leather or Nylon materials.