Flex Medium Frame Graphite Shaft Graphite Length 10 mm longer AERO Frame Cuts air resistance for faster swing speeds and increased maneuverability. 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 racquet generates a larger sweet spot by optimizing the intersection of the main and cross strings. ISOMETRICTM delivers greater control without sacrificing power. ISOMETRICTM is a Trademark of Yonex CO., LTD. *Tested by Yonex Sonic Flare System Max Acceleration Carefully selected high modulus graphite are strategically placed across the bottom of the frame to provide unrivalled power and stability for maximum shuttle acceleration. Slim Shaft Designed to slice through the air, generating speedy power.