New Balance Men's MR903 Running Shoe 100% Synthetic ABZORB provides a superior blend of cushioning and compression set features with Dupont Engage and Isoprene rubber for the ultimate ride ACTEVA ULTRA LITE is 32% lighter than standard mid-sole foam with optimal compression set made with DuPont Elvaloy NLOCK is an integrated lacing and webbing system that provides optimal fit, support and security PHANTOM LINER is seamless lining