Psycho Hybrid combines Power Fiber II, our most popular multifilament string with Cyclone, our exclusive ten-sided co-polymer string. Using Power Fiber II in the mains creates exceptional feel and shock reduction while the Cyclone crosses improve spin potential. Using Cyclone in the crosses enhances spin potential for control and durability while the Power Fiber II gives this hybrid a comfortable feel. Psycho Hybrid lets you go PSYCHO on the court!