ISOMETRIC - Enlarged Sweet Spot ISOMETRICTM technology continues to help the world’s greatest players achieve global success. Developed over 30 years ago, the ISOMETRICTM design increases the sweet spot by 7%*. Compared to a conventional round frame, a square-shaped ISOMETRICTM racket generates a larger sweet spot by optimizing the intersection of the main and cross strings. M40X A next-generation highly strong, yet elastic carbon fibre developed by Toray Industries, Inc. (TORAYCA M40X is developed by Toray Industries, Inc.). Solid Feel Core Reduces vibrations traveling down the shaft for improved comfort. Sonic Flare System Carefully selected high modulus graphite are strategically placed across the bottom of the frame to provide unrivalled power and stability for maximum shuttle acceleration. Super Slim Shaft Reduced Air Resistance, designed to slice through the air, generating speedy power. Energy Boost CAP PLUS Uniquely shaped cap which maximizes shaft performance. The front allows the shaft to flex, while the sides archshaped curve stabilizes the racquet face by preventing the shaft from twisting.