The Burn 100 continues to generate the power needed to blast shots from the baseline. However, it is now integrated with Countervail technology. Countervail is Wilson's all-new material technology that is integrated into the frame and maximizes a player's energy by reducing muscle fatigue and shortening recovery time. The material smartly redirects the balls energy within the frame instead of to the body so you can keep playing hard until the very last shot. The 100 offers versatile power for player who want a bigger sweet spot and an open string pattern.