From Manufacturer - Engineered for the fast-paced runner desiring the resilient, responsive ride provided by Nike Shox cushioning and the Zoom Air unit. The one-piece innersleeve construction of the breathable mesh upper provides a dynamic fit, with structural overlay combining with a gilly lacing system to keep the midfoot snugly in place. Full-length BRS 1000 carbon rubber outsole with modified circular waffle pod design offers enhanced cushioning and excellent traction.