> fibers are coated in plastic No: Cotton is chemically treated. https://en.wikipedia.org/wiki/Wrinkle-resistant_fabric https://en.wikipedia.org/wiki/Wrinkle-

> fibers are coated in plastic No: Cotton is chemically treated. https://en.wikipedia.org/wiki/Wrinkle-resistant_fabric https://en.wikipedia.org/wiki/Wrinkle-resistant_fabric Perhaps you are thinking of "However, almost all the wrinkle resistant garments are made with poly/cotton blends fabrics."