Polyester tablecloths are not inherently shiny. They typically have a matte finish, providing a clean and elegant look. While they may reflect light to a certain extent, they do not possess a glossy or shiny finish like satin or silk fabrics. Polyester tablecloths are popular due to their durability, wrinkle resistance, and easy maintenance, making them a practical choice for various events. However, the exact texture and appearance can vary depending on the specific weave and finish of the polyester fabric used.