One size : Adjustable snapback baseball cap, fits for most adults，unisex. Excellent material：twill cotton-blend fabric. Sun Protection: The baseball cap is an ideal hat for outdoor activities such as running, hiking, cycling, etc. with protection from the sun. Broken-in fit and feel, making it suitable for everyday use，which is not only soft and skin-friendly, but also wear-resistant. Perfect for : men or women, family holidays wearing, as baseball cap, golf cap, trucker cap, hiking hat, sun cap, couples cap, etc