Use a steamer on low to medium heat
Hang the polyester garment in a bathroom with hot steam
Tumble dry on low heat with a damp towel for a few minutes
Use an iron on the lowest synthetic setting
Place a pressing cloth between the iron and the fabric
Iron inside out
Lightly mist the fabric with water before ironing
Smooth the garment by hand while it is slightly damp
Hang the item immediately after washing
Avoid high heat to prevent damage to polyester