Signum Pro's X-perience string is built for players who want more control on their biggest swings. Although it is made from a stiff polyester base materal, Signum Pro has injected special additives to improve comfort, power and feel. The result is a control string with great feel. X-perience is also shaped, giving it a sharp bite and massive spin potential. With its higher comfort level, X-perience is an obvious choice for the big hitter who wants some extra spin and comfort.