New Balance Men's MR1123 Running Shoe 100% Synthetic and mesh Rubber sole Motion control ABZORB FL midsole foam provides an amazing blend of comfort and performance with DuPont Engage and isoprene rubber ROLLBAR TPU posting system minimizes rear-foot movement that, when combined with TS2 system, achieves the ultimate in motion control ABZORB SBS is an engineered, non-cellular elastomer designed to provide optimal shock absorption and no compression set NLOCK is an integrated lacing and webbing system that provides optimal fit, support and security