Since 1920, Levi's single 501 for the selection of high-quality weaving, the kind of 100% cotton cloth before the first super heavy-duty washing, so that the stability of the fabric increased, and more play wear-resistant Characteristics, so whether it is a large production line or hand-washing effect, can create a natural fabric in this high-quality fabrics. In addition, 501 has been using traditional cloth cut, less fabric loss, in line with the trend of environmental protection in the world.