Characteristics: What do you get when you marry all the latest technologies into one frame? – The ion X-force! This is the first model to feature the Power Surge bars that sandwich the throat and shaft to provide X-tra stiffness and X -tra vibration dampening qualities, and X-tra power. This may be one of the hottest racquets to hit the market this year. The black version is slightly lighter than the yellow model but both are truly X-treme!