New Balance - MX8515 (Navy/Silver) - Men's: An innovative NB Zip cushioning shoe developed for athletes looking for a supportive trainer and a responsive ride. Synthetic/mesh upper provides lightweight comfort and support. N-DURANCE rubber compound outsole offers maximum durability in high-wear areas. NB Zip Heel is a responsive cushioning technology that is supported by strategically located shock absorbing struts. ABZORB SBS in forefoot for maximum shock absorption. ACTEVA LITE Midsole is compression molded EVA which delivers cushioning and flexibility.