New Balance Women's WR1225 Running Shoe,White/Blue,8 D 100% Synthetic and mesh Rubber sole N-ergy is a resilient engineered elastomer designed to provide shock absorption and responsiveness for the optimal ride Stabilicore is a medial support system that provides an extremely smooth transition from heel strike to toe-off, made from an injection molded engineered thermoplastic that offers a great deal of precision and consistency ABZORB FL midsole foam provides an amazing blend of comfort and performance with DuPont Engage and isoprene rubber Stability Web provides optimal arch support thats both rigid and lightweight while preventing midfoot flex NLOCK is an integrated lacing and webbing system that provides optimal fit, support and security