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, a brand new all round racket with an easy to swing weight to make a perfect introduction to the BLX revolution. Unmatched balance of power, control and feel. Free Karakal Grip when you purchase this racket.