New Balance Men's MR817 Running Shoe 100% Mesh Motion control ABZORB provides a superior blend of cushioning and compression set features with Dupont Engage and Isoprene rubber for the ultimate ride ACTEVA is 12% lighter than standard midsole foam with DuPont Engage for exceptional durability ROLLBAR TPU posting system minimizes rear-foot movement that, when combined with TS2 system, achieves the ultimate in motion control NLOCK is an integrated lacing and webbing system that provides optimal fit, support and security