A shoe elite tennis players can trust when play heats up. The unique geometry of the Speedboard(R) supports the foot without limiting flexibility, and strategically placed overlays and reinforcements offer durability when sliding on hard courts. Design: Overlays, molding, and reinforcements protect during slides Inside eyelets to prevent broken laces Speedboard(R) supports the foot without limiting flexibility Midfoot lacing cage locks in the foot during dynamic moves Generous padded heel for comfort In-Shoe Comfort: Bottom-loaded Speedboard(R) stretches under the toe box for energy return Stiff Helion(TM) foam insert delivers stability, comfort, and energy return Durability & Traction: Decoupled herringbone design on the outsole for traction Additional Details: Best for: Tennis Heel-to-to drop: 8mm