This Seattle Mariners Chrome Yellow and Royal Blue Trucker Mesh New Era 9FIFTY A-Frame Snapback Hat hat features a sturdy A-frame construction. The A-Frame refers to the front panel construction, which is structured and slightly more angular than a traditional cap. This provides a distinctive shape and a higher crown. This hat comes with a slightly pre-curved bill. The undervisor is green. The back has an adjustable snap so you can get the perfect fit.