Sublimated Baseball Uniforms Custom Sports Uniform. Valkout Apparel always produces custom sublimation baseball uniforms by digital printing sublimation. We offer custom baseball uniforms no minimum quantity order, no extra fees for adding custom baseball player names and numbers, colour and any decorations. We produce full levels of custom sublimation baseball uniforms from ages at kids, youth and adult. We manufacture custom sublimated baseball jerseys with button up collar, V neck and full button down style. Usually for sublimated baseball uniforms, we use the 100% polyester fabric at 160gsm which is moisture management and breathability.