Ironing involves the use of a machine, usually a hot tool, to remove wrinkles from the fabric, and heating is typically done at a temperature of 180 to 220 ° C (356 to 428 ° F), depending on the type of fabric . Ironing works by loosening the bonds between long-chain polymer molecules in the fibers of the material. Ironing removes wrinkles and shrinkage, and leaves clothes fresher. Wearing clean, new clothes makes you feel better about yourself and increases your self-confidence.