Prince Vortex is a spin machine designed for players with long, fast strokes. With its predictable and low-powered response, it will enable you to attack the ball with your most powerful strokes. Vortex comes with a shaped hexagonal profile, giving it plenty of grip for easier access to spin. Although it has a firm monofilament construction, Prince has manufactured Vortex with softening agents to boost elasticity. As a result, the comfort level is above average for a poly-based string.