This incredible lightweight shoe is perfect for the athlete looking to for cushioning and breathability. Super lightweight mesh upper with welded TPU overlays for support. Full length midsole with Zoom Air unit in the heel for faster responsiveness. Unique TPU midfoot shank and forefoot Propulsion Plate provide a firm surface to push off of. Outsole consists of: Lightweight BRS 1000 rubber in the heel. Lateral forefoot Duralon material for extra cushioning. Medial forefoot toe off zone with BRS 1000 carbon rubber for flexibility and traction.