The Wilson ULTRA 100 V4, head size 100 (645 cm2), 16x19 weave, is the most popular, most versatile and most powerful racquet in the Ultra line. It is designed for advanced and experienced players. Thanks to the new design and new geometry, this racket is different from all previous versions. The FORTYFIVE° technology is based on strategically placed carbon fibers in the frame for improved stability, force and feel. The key change is the new frame geometry, which noticeably increases the size of the Sweet Spot and improves performance. Some parts are made of “Agiplast” which is an eco-plastic. The revolutionary design combines beautiful, colour-changing blue tones with a matte finish for a captivating and unique look.