This multi-surface tennis shoe features a lightweight, synthetic upper with Contour Speed Fit for forefoot flexibility and customized fit. A full-length Phylon midsole and heel/forefoot Zoom Air units offer you impact protection and a smooth, cushioned ride. Heat Block technology and Momentum Control System increase performance in demanding, athletic activities. The high-wear, XDR rubber outsole with full herringbone pattern is suited for a variety of court surfaces.