Yonex Ezone: The 7th generation EZONE adds 2G-NAMD graphite for faster ball speed without sacrificing comfort. Vibration Dampening Mesh (VDM) in the handle filters out unwanted vibrations without overly muting the response. The sweet spot of the EZONE feels massive thanks to Yonex` Isometric head. A refined aero shape design features a thinner frame face for a softer feel. Yonex carried over their Liner Tech technology from the previous version by using straight hole grommets to elongate the sweet spot. The result is more power and comfort, even when missing the sweet spot. The cross section is slightly thicker at each level(.5 mm) than the previous version and while it still has the iconic EZONE feel, the racquet plays sturdier and a bit more powerfully than the previous models.