2015 Wilson Women's Performance Rush Pro 2.0 Torque Chasis Tennis Shoes 2D-F.S: Die cut polyurethane is strategically placed in the forefoot, providing superior support, enhanced responsiveness, lateral stability, and control. DF2: Dynamic fit heel-toe drop 9mm for great forefoot responsiveness, low to the ground court feel, and dynamic cushioning. R-DST - Augments cushioning and rebound for comfort and responsiveness. Outsole: All-court Duralast outsole for durability & traction Lightweight synthetic leather & mesh uppe