The Volkl V8 Pro Unstrung Tennis Racquet has improved super grommets and V-Cell technology that is a lightweight graphite that will improve responsiveness and feel. This racquet also features Reva technology that helps eliminate racquet vibration for a smooth feeling frame. There is a silicone polymer in the butt known as Vtex and this racquet is great for aggressive baseline players that want a spin friendly frame with an awesome mixture of power and control. Purchase tennis string from the same seller on the same order and we will string your order to a mid-tension for free .