New Balance Women's WR670 Running Shoe 100% Fabric and synthetic ACTEVA ULTRA LITE is 32% lighter than standard mid-sole foam with optimal compression set made with DuPont Elvaloy ABZORB provides a superior blend of cushioning and compression set features with Dupont Engage and Isoprene rubber for the ultimate ride Ndurance is a rubber compound for maximum durability used in high wear areas