Rayon is a regenerated natural fiber that is produced from cellulose fiber. In other words, rayon is 100% cellulose and has the same chemical composition as the natural cell. The molecular structure of the rayon is the same as that of cotton and linen, except that the molecular chains are shorter and do not form as many tiny crystals. The many types and grades of rayon fibers can imitate the feel and texture of natural fibers such as silk, wool, cotton, and linen. Rayon fiber is used to make textiles for clothing and other needs.