Sublimated Polo Shirts Custom Polo Shirt Embroidery. Before doing bulk orders or working together on dye sublimation polo shirts, Valkout Apparel always makes samples of custom polo shirts with your own design and custom logos. You will receive these samples so that you can personally assess their quality. You can examine our design capabilities, printing, sewing, heat transfer, and packaging quality. We always offer excellent after sale support and communicate with customers immediately. We finish samples of custom design sublimation polo shirts in around five days. We will always offer you real time updates about the actual production, which is based on the actual quantity.