Garment dipping What is a wrinkle free shirt? A wrinkle free shirt is a garment that is treated so it preserves its condition, soft appearance and creases after laundering. If the garment is tumble dried out, little Ironing or No ironing is required. Wrinkle free materials can tolerate even the roughest of treatment. Despite the fact that Wool is a lot more powerful than cotton, this method is mostly done with cotton fabric. Cellulosic fiber including fabrics are made resistant to creases by the use of a durable wrinkle- free process which comprises the treating a cellulosic fibre with formaldehyde, a resin with a catalyst, a softener, polywax emulsion and an Optical Brightening agent.