Polyester is a synthetic fabric that you can machine wash and dry. Polyester does not wrinkle easily, but if you let it sit in your dryer for a while or if you store it crumpled, it can become wrinkled. Use an iron to remove these wrinkles or creases. Be careful, however, as you can overheat polyester and melt the fabric fibres. This process is irreversible and will ruin the fabric. Take proper precautions to prevent this.
Set the iron on "Low" heat. Let it reach temperature.
Turn the polyester fabric inside out.
Lay the polyester fabric on the ironing board. Smooth it with your hands to flatten any wrinkles.
Fill a spray bottle with water. Spray the polyester with the water so that it is slightly damp. Smooth the polyester with your hands to remove wrinkles or creases.
Place a cotton cloth or a terry cloth towel over the polyester. This will prevent the heat from the iron from burning or melting the polyester.
Press the iron over the cloth and iron it until the polyester is wrinkle-free. Be careful not to burn the polyester.