New Balance Men's MR904 Running Shoe 100% Synthetic and mesh 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 Stability Web provides optimal arch support thats both rigid and lightweight while preventing midfoot flex Performance outsole