●Material: Cotton ●Head circumference: 22.0 - 22.8 inches (56 - 5 ●Added to the back of the sunglass hat and can be worn back and forth ●Lightweight, breathable, and moisture wicking and quick drying, so you can use it comfortably for a long time ●Unique hat design, can be worn for skiing, cycling, sunbathing and other occasions