Durable cotton with hook and loop closure. Empty top design allows you to shade while avoiding the sultry overhead. The streamlined hat makes the hat look more beautiful. Unisex design with classic colors, suitable for direct contact with the skin, breathable and sweat-absorbent, able to maintain comfort during summer sweating. Have a certain hardness, and can maintain its original shape. Great for hot summers, shopping, parks, outdoor sports, fitness, picnics, seaside vacations, and can be very good for shading. 23" Circumference