Washed cotton bedding fabric, despite its name, is produced entirely from 100% polyester fiber — specifically, a microfiber or standard polyester base fabric that has been subjected to a specialized post-finishing sequence including high-temperature washing, tumble drying, and softening treatments that transform the fabric's surface character and hand feel to closely approximate the natural aesthetic of genuine cotton.
The terminology reflects the process and the intended surface effect rather than the fiber content, and understanding this distinction is central to appreciating why all-polyester washed cotton fabric offers a set of performance advantages over its natural fiber counterpart that make it the preferred choice for a growing segment of the global bedding market.