New Balance Women's W770v2 100% Synthetic Rubber sole 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-ERGY in the heel provides NB's most advanced shock absorption and cushioning Medial Post located on inside edge of shoe to help prevent overpronation. Synthetic/Mesh Upper. Weight: 8.7 oz