It is best not to buy a cotton suit, which is easy to wrinkle. And although elastic cotton is changeable and will go back after washing, some suits can stand washing all day. Relatively speaking, velveteen, polyester and wool are better: velveteen is softer and less wrinkled; Polyester can be a little harder and not easily deformed, but the fabric is not very comfortable; Wool is warm and not easy to deform, but it is difficult to buy real goods and the price is higher.