Material: 90% nylon, 10% spandex. Black, set of 3. These are essential when wearing a full wig. They gather your natural hair to create a base and prevent the wig from slipping. They also help to prevent the wig's base from being visible. Wearing a wig cap also alleviates irritation, such as the itchiness caused by the wig directly touching the scalp, and reduces stuffiness. A wig cap is used between the wig and the scalp, like "underwear for wigs." Since it comes into direct contact with your skin, we recommend replacing and washing it frequently. It reduces damage from sweat and odors to the wig itself, making daily wig care easier.