Created from recycled PET materials, the HAWK TOUR RPET is an advanced co-polyester tennis string with a 7-sided structure that grips the ball for extreme, explosive spin. Perfect for players who are looking for maximum control and spin, this high-performance string has a firm, predictable response for accuracy, giving you the confidence to play attacking tennis. Enjoy a dynamic playing experience with a string that has an optimized feel with a fine-tuned blend of control, spin and power. Head Hawk Tour rPET Tennis String | Natural | Christy Sports