Designed for those who prefer a lighter weight construction with the integration of Wilson's new technology BLX, has used basalt fibres (Basalt is natural volcanic rock) and woven them longitudinally with karophite Black to create one of the most advanced composites in the industry, for a greater feel and forgiveness. Articulated Grommet technology for an even bigger sweet spot. Free Karakal Grip when you purchase this racket.