Engineered to outpace the demands of urban running, this sock-fit shoe sports a ribbed lacing cage that locks your foot comfortably to the springy foam sole.Perfect for: Urban runners who need responsive, full-foot cushioning that stands up to the challenges of navigating concrete and asphalt surfaces.Upper: The stretchy sock features 3D heel padding that holds your foot in place as you move. Zonal knitting dynamically embraces a wide array of foot shapes. A TPU lacing cage locks in the fit for