Solinco Tour Bite is a firm and durable co-polyester that delivers excellent control and massive spin to players with long, fast strokes. It is an ideal string for aggressive players. It is designed and shaped to generate extreme power, maximum bite, and intense spin potential. Utilizes an innovative, high-power co-polyester monofilament fiber designed and shaped to generate maximum power while amplifying the spin and bite intensity of the ball. Great for players seeking control and spin, Tour Bite offers tremendous ball bite with its square shape.