There is no pure cotton in the velvet four-piece suit, because cotton can't be made into velvet. Because with the arrival of beginning of winter, the weather in many areas has dropped sharply. Because of this, people put on velvet four-piece suits in order to keep warm. Generally speaking, the velvet four-piece suit is suitable for use at MINUS four or five degrees, but cotton can't be made into velvet, it is a natural short fiber and can't be cut into velvet. So the velvet four-piece suit is not made of pure cotton. So there is no pure cotton in the velvet four-piece suit because cotton can't be made into velvet.