This hybrid string set from Prince is a combination of the Recoil and Poly Spin 3D, which will give the player the precise string realignment with maximum spin advantage. Poly Spin 3D: (Mains) Using the unique Co-Extrusion Technology, this string provides added durability, better tension maintenance and less shock. Its high density 3D edges bite the ball for maximum spin, constructed with a medium density core for control. Recoil: (Crosses) This unique string realigns after each hit, creating consistent, long lasting performance and superior playability. Utilizing a revolutionary new coating technology from Gore, the strings snap back and propel the ball with more spin, feel and comfort. Gore MicroWeb Technology is a patented material that is made from a proprietary formulation of expanded polyTetrafluoroethylene, or ePTFE. This Gore technology provides an ultra-low friction surface, creating a combination of benefits never before achieved in string design, including precise string realigment and drastically reduced string notching for increased durability. In addition, Recoil's advanced thermoplastic core and multi-layered construction provide extra comfort and better feel.