The shape and push-off ability of the frame are precisely engineered to increase the speed of the racket. The overall design of the frame creates an exciting feel to this racket, encouraging players to jump into faster rallies. SONIC FLARE SYSTEM - Maximum acceleration. Revolutionary new TORAYCAR M40X graphite material and SUPER HMG deliver unmatched power and stability for maximum acceleration.NANOCELL NEO - Resilient yet surprisingly flexible graphite material.AERO FRAME - AERO Frame reduces drag and allows for a faster swing.BUILT-IN T-JOINT - Molded into the graphite layers where the head meets the shaft, it provides a strong, twist-resistant connection.SUPER SLIM SHAFT - Thinner shaft cuts through the air more easily and greater flexibility adds power to shots.ISOMETRIC™ - ISOMETRIC™ technology continues to help the world's best players achieve global success. Developed over 30 years ago, ISOMETRIC™ construction increases the pure hitting area by 7%*. Compared to a conventional round frame, the square ISOMETRIC™ racket generates a larger sweet spot by optimizing the intersection of the main and cross strings. ISOMETRIC™ provides greater control without sacrificing power. ISOMETRIC™ is a trademark of Yonex CO., LTD. *Tested by Yonex.