Generous Fit: Accommodates players with wider feet for a more comfortable fit and feel. 4D Support Chassis: Provides superior stability to help control pivot movements. Composition: Technologies enhance comfort and support with breathable mesh and additional cushioning. Ideal Playing Surface: All Court Surfaces. The R-DST+ offers the optimum combination of cushioning and rebound for better dynamic performance. The Rush Pro Ace is the most generously fitting shoe in the popular Rush Pro line, and is a favorite among tennis players who prioritize on-court comfort. Featuring a 2E width designed for wider feet, this shoe also helps stabilize the foot with its 4D Support Chassis – a symmetrical heel-to-toe frame that limits supination to help control rotation. Enhanced with a layer of Sensifeel on the upper for increased breathability, the Rush Pro Ace offers an attractive blend of comfort, stability, and aesthetics for supreme confidence with every step.