Stability Web delivers midfoot support and reduces the weight of the shoe * ABZORB cushioning in heel and forefoot, N-Durance, Blown rubber forefoot for lightweight cushioning * N-Durance® rubber compound for maximum outsole durability * Medial Post located on inside edge of shoe to help prevent overpronation. Forefoot Flex Grooves, ABZORB Strobel Board * ABZORB cushioning in the midfoot provides exceptional shock absorption