New Balance Women's WR850 Running Shoe 100% Synthetic and mesh Rubber sole New STABILICORE medial post technology - helps to control the rate of over pronation and h Full length ABZORB midsole - provides long lasting cushioning and makes for a more comfy, Full length perforated ABSORB strobel sock provides additional cushioning. Visible ABZORB SBS in heel and forefoot on ACTIVA midsole increases the cushioning effect Extended STABILTY WEB provides lightweight torsional midsole stability.