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. Combing polyester mains with multi-filament crosses, the Babolat Hybrid Pro Hurricane Tour 17 + Xcel 16 encompasses the control and spin of a polyester with the comfort and forgiveness of a soft multi-filament. The result is a firm feeling string bed that still maintains good pop.