New Balance Women's WR749 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 Stability Web provides optimal arch support thats both rigid and lightweight while preventing midfoot flex ACTEVA is 12% lighter than standard midsole foam with DuPont Engage for exceptional durability NLOCK is an integrated lacing and webbing system that provides optimal fit, support and security Medial post