The Reebok Club Ace Tennis Shoe has a canvas upper which provides soft, comfortable support. DMX® Foam for added cushioning. Low-cut design for mobility. Transition Bridge™, external heel cup add stability and support. IMEVA midsole increases cushioning. EVA sockliner is removable to accommodate orthotic inserts. Carbon rubber heel and herringbone outsole for added traction. Forefoot flex grooves increase shoe's flexibility.