Cup-Stack Carbon Nanotube: The new material Cup-Stack Carbon Nanotube is applied in the racquet frame which enables to give the players right amount of flex to stay with the ball, and quick repulsion to make the full energy available for power return.

Isometric: The Isometric square head shape reduces the inert space found in a conventional round frame making the racquet is easier to swing through and providing superior maneuverability. The sweetspot is the area of a racquet where the longest main and longest cross strings meet in the stringbed. In an ordinary round frame racquet, the sweetspot is where the 8 main and 11 cross strings meet. In the Yonex Isometric square head racquet, 10 main and 13 cross strings meet in the stringbed to produce a sweetspot that is 10% larger than the effective hitting area of a conventional round head racquet.

I.P.S.: I.P.S. (Integrated Power Weight System) positions extra weight at the sides of the frame to give the face a greater moment of inertia.

Elastic Ti: Elastic Ti charges the shaft for power, velocity and better control. Yonex Nano-scale Elastic Ti is the only alloy providing racquet qualities once considered impossible: extremely low elasticity and extremely high strength together. Elastic Ti is 44% less elastic and 8% stronger compared with the previous best Ti alloy.

Dual O.P.S.: The Dual O.P.S [Oval Pressed Shaft] provides a more comfortable feel, sharper response from the string bed and higher repulsion power without increasing the frame thickness.

S-Fit: Speed or Comfort? S-Fit's unique grommet structure allows you to choose between two contrasting stringing patterns for comfort or speed - it's up to you!

Comfort Pattern: Comfort pattern provides a comfortable feel at impact and effortless power.

Speed Pattern: Speed pattern provides a solid feel at impact with greater ball speed.

Important Stringing Note: By default this racquet will be strung with the Speed Pattern, but Holabird Sports can also string this racquet with the Comfort Pattern. If you prefer the Comfort Pattern, please call our customer service at 410-687-6400 to place your order.