Bold and visible Referee lettering made with durable high quality pvc 100 percent hight quality polyester durable lightweight Mid profile classic baseball structured hat with curved visor bill Adjustable velcr back fits most adults Please contact us to choose any customization 100 percent risk free purchase guaranteed Classic Sports Team custom Referee letters hat. Classic Premium Structured Baseball Hats with curved visor are made with durable 100% polyester with six panels and eyelets, 6 rows of stitching on pre-curved bill soft hand feel, adjustable back to fit most. Made with high quality durable materials.