The wilson steam 99 s tennis racket is designed for intermediate and advanced players who want to maximize performance and offers enhanced control thanks to a mid plus 99in2 639cm2 head for impressive spin potential the racket features spin effect technology and vibrations are reduced due to amplifeel 360 technology it is head light balanced for easy manoeuvrability and good playability and comes strung with sensation string ensuring a nice blend of comfort and power to let you analyse eve