This performance packed men's running shoe offers a more flexible and smoother ride with the upgrade from ProGrid to PowerGrid. Breathable mesh upper with FlexFilm synthetic overlays for a foot-wrapping, seamless, comfortable fit. Moisture-wicking HydraMax collar lining and memory foam heel pods for added comfort and a snug fit. Rounded heel and decoupled heel crash pad for smoother transition through the gait cycle. Outsole forefoot flex grooves with triangular traction pads and XT-900 carbon rubber heel and toe pods for flexibility and improved grip.