The twisted CurvAktiv side profile makes the racket resistant to torsion, remaining stable and keeping the force of the racket swing focused as it pushes through the ball, while the Air Power concave structure on the lower sides of the racket lower the weight of the racket and make it more aerodynamic, making it easier to wield and faster when reacting. The Fibrix carbon fibre and fibreglass blend is more flexible than the surfaces of the Vertex 04 25 or Vertex 04 Hybrid, improving its rebound potential for easy power. Inside the racket’s core, two layers of firm EVA foam allow you to transfer all the energy from your swing directly onto the ball. Between the two firm EVA layers is a softer, low-density layer of EVA that provides a softer touch, allowing you to stay in control of your shots while giving you a plush feel as you strike through the ball. The materials and geometry of the racket are designed to minimise the impact of vibrations and protect your arm health, whether that be the angular structure of the Vertex Core that redistributes force between its edges or the Ease Vibe vibration dampeners within four of the drilled holes. Spin comes from the Top Spin relief pattern on the surface, using high density grain to provide high levels of friction on the ball and thus generate revolutions as it exits the racket face.