Babolat now offers pre-packaged hybrid strings to provide the optimal combination of power and control. Babolat Pro Hurricane Tour is an excellent choice for big hitters looking for extra spin. Octagonal (8-sided) cross-section adds the extra bite on the ball for added topspin and slice. Firm feel and outstanding durability as well. Babolat Xcel is an update to Xcel Premium that offers improved durability without sacrificing playing comfort. Xcel offers much of the elasticity and feel of Xcel Premium with above average tension maintenance for better control. New coating resists notching for improved durability. Winning Combination: Hybrid technology allows players to take advantage of the combined benefits of two different types of strings (one for the mains and one for the crosses) to create a winning combination. These combinations are now prepackaged for easier use. Babolat Tennis String 281005-13685