A special "tri-cluster" FiberGEL filaments integrated in a polyamide 6 core. Has a polyamide 6 monofilament wrap with three polyester fibers inside each monofilament and a DuPont synthetic 66 coating. FiberGEL filament provides maximum ball pocket, great power, and superior control. Polyester filaments provide added durability, control, and a crisp feel.