The raw materials for washing cotton are mainly natural cotton and polyester. Washable cotton has good air permeability, tone, luster and soft and comfortable touch. The washed cotton surface treated by high temperature ironing makes the cotton fiber not easy to fall off, and has good tensile property, washing resistance, high density and heat preservation property. Because the washing cotton is the combination of pure cotton and polyester, so the four-piece suit washing cotton not only has the advantages of pure cotton, but also has the advantages of polyester, making the four-piece suit washing cotton more popular.