The sale, offering for sale, advertising, delivery, transportation, or causing to be transported, after shipment in commerce, of any textile fiber product, whether in its original state or contained in other textile fiber products, which is misbranded or falsely or deceptively advertised, within the meaning of this subchapter or the rules and regulations promulgated thereunder, is unlawful, and shall be an unfair method of competition and an unfair and deceptive act or practice in commerce under the Federal Trade Commission Act [
15 U.S.C.
41 et seq.].