Muscle Power locates the string on rounded archways that eliminate stress-load and fatigue through contact friction. This construction creates total unity of the string and frame through closer and tighter contact. 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 MUSCLE POWER FRAME Unity of String & Frame Muscle Power locates the string on rounded archways that eliminate stress-load and fatigue through contact friction. This construction creates total unity of the string and frame through closer and tighter contact. Frame Aluminum Shaft Graphite / Nylon Weight / Grip 2U (Avg. 93g) G4 Stringing Advice 2U: 16 - 20 lbs Color(s) Blue (Cyan)
