New Balance Men's MX854 Training Shoe 100% Leather ABZORB SBS is an engineered, non-cellular elastomer designed to provide optimal shock absorption and no compression set ROLLBAR TPU posting system minimizes rear-foot movement that, when combined with TS2 system, achieves the ultimate in motion control ENCAP is a core of soft cushioning EVA in the midsole with a tough polyurethane rim for more support and durability C-CAP is a compression-molded EVA for superior midsole cushioning and flexibility