As an inexpensive fiber, rayon has often been used in low-end, poorly constructed garments that have tarnished its reputation. The two major types of rayon, regular viscose and high wet modulus, have created further confusion and contributed to improper care practices by consumers not aware that two fabrics with the same fiber content might require totally different methods of care. Rayon fibers and fabrics made from them have many desirable properties. However, consumers sometimes expect performance characteristics beyond those for which rayon fibers were designed. Although rayon can look like wool, silk, cotton or linen and is a manufactured fiber like polyester, this doesn't mean it behaves like or has the same properties or care requirements of these fibers.
Rayon is a fiber unto itself.
Consider each garment made from rayon individually when determining use and care practices. And always read and follow care labels for best performance. A cellulosic, man-made fiber approved as a new generic or fiber type in Europe and awaiting that classification in the United States is lyocell. Lyocell is direct-spun, which involves less time, water and energy in production, and involves the recovery, recycling, and reuse of products required in the spinning process. Currently, Tencel by Courtaulds is the only lyocell fiber in commercial production and available in garments on the consumer market.