The cap is equipped with metal adjustment buckle, which can freely adjust the size of the cap circumference. It is practical and can be used in four seasons. The thickness of the fabric is moderate, the hat body is single-layer fabric, without lining, classic curved brim hat, strong and straight, not pick face shape, cool and stylish, natural comfortable and breathable, light and dry, with sweat absorption belt added inside, which can absorb sweat and moisture, and fit the head circumference well