It utilizes DuPont Teflon friction-reducing Polymer that enables the strings to slide through the grommets without any friction. In return, this dramatically reduces the mechanical energy lost during direct ball impact—thereby leading to lower resistance, more string movement, and greater power. And at its core is MicroGel technology, which includes silicone-based materials combined with carbon composite fibers in the racquet hand. This causes the strings to deform and compress when impacted, allowing the impact load to be uniformly distributed—thereby creating a ‘rock-solid’ feel.