The New Balance 8512 is an innovative running shoe for the competitive athlete looking for cushioning and a responsive ride. Synthetic/mesh upper provides lightweight comfort and support. Ghille lacing system offers support. Reflective detailing enhances your visibility. Dual-density collar uses both a softer-density foam against the foot for cushioning and a firmer-density foam for support. NB ZIP™ controlled cushioning in the heel provides durable responsiveness. Removable full-length insert of ABZORB® cushioning offers added comfort. ABZORB® cushioning in the forefoot delivers exceptional shock absorption. ACTEVA™ Lite lightweight midsole adds optimal resistance to compression set. NDurance® rubber compound gives maximum outsole durability. Blown rubber forefoot brings lightweight cushioning. Wt. 11.4 oz.