Thanks to the innovative Crystal Core Technology, a manufacturing process that allows to influence each string's individual balance between power and control, the HAWK TOUCH features a bigger crystalline inner core responsible for providing ultimate control to your game. Designed for high-level Tour and tournament players, the string's elasticity allows for accurate feedback and exquisite feel so you can follow through with your versatile game and perfectly control every stroke and, ultimately, the game. If high-level control is your game, HAWK TOUCH is your string. Used by A.Zverev, Y.Sinner and many other male and female pro players.