ISOMETRIC frame increases size of sweet spot and improves power. The ISOMETRIC™ equalizes the length of the main and cross strings in the string-bed, enlarging the sweet spot for more consistent accuracy even on off-centre hits. Decreases air resistance and realizes a quicker swing. About The Brand Yonex, over the years, has become one of the world’s foremost companies in tennis, badminton and golf equipment. Known for their technological prowess and advancement in the field of sporting equipment, Yonex aims at providing the opportunity to step up your game, regardless of your level of expertise. Important Note: The Color and Texture may vary subject to the availability.