If you can't stand the ball, cotton is definitely better, but there will still be a little bit. It is impossible to stand the ball completely. Because no matter what material it is, as long as it is worn several times, there will be some pilling problems more or less. Especially the kind that clings to the skin of the body, pilling is really powerful. If this problem really bothers you, you can choose loose leggings or some big brands, which may be relatively better.