Vibrocore is used to reduce frame vibration by up to 45% after ball impact for a comfortable feel. A sleeve portion is made from a thermal-plastic resin system while the round core material is made of silicon rubber. Together, these two materials combine to produce a superior vibration dampening system. When the ball makes contact with the stringbed, shock waves are absorbed in the shaft of the racquet, preventing it from traveling down the handle. The reduction of the shock waves reduces the risk of tennis elbow and provides exceptional comfort for players.