Synthetic turf is only as good as what sits between the blades. Infill carries the load. It holds fibers upright, absorbs impact, controls ball roll and bounce, and, more than any other component, shapes how a field feels and how hot it gets. For decades, the default answer was crumb rubber. Today, however, increasing environmental scrutiny, regulatory change, and demand for cooler, more natural playing surfaces are driving the search for alternatives. Among the materials gaining the most attention is cork.