New Balance Women's WT609 Trail Running Shoe Synthetic and mesh ABZORB provides a superior blend of cushioning and compression set features with Dupont Engage and Isoprene rubber for the ultimate ride Injection molded EVA midsole Nylon shank Ndurance is a rubber compound for maximum durability used in high wear areas AT TREAD is a dual-use outsole tread combining both trail and running lug designs for on and off-road