From the first inning to the last out—immerse yourself in the ultimate baseball experience with the New Era White Sox 59Fifty Felt Fitted Cap. Versatile, comfy, and ready for action, this fitted cap lets you groove to the beat of dingers and swingers with ease. Swing into the grand slam of fun with the New Era White Sox 59Fifty Felt Fitted Cap. Crown/Visor/Button: 100% polyester; Undervisor: 100% cotton.