DESC: Utilizing heel NB Zip cushioning technology, the New Balance 8509 is a performance running shoe for the competitive athlete who craves responsive cushioning, great fit and cutting-edge design. Synthetic and mesh upper with reflective detail. NB Zip in the heel provides responsive cushioning technology that is supported by strategically located, shock-absorbing struts. C-Cap molded EVA midsole with ABZORB insert offers optimal shock absorption and no compression set. NDurance rubber outso...