synthetic-and-leather Calfskin leather that molds to the foot while the AccuFoam puts power behind every strike. Asymmetrical, low profile lacing and low profile tongue. Everfit Cage for support. Removable EVA foam insole for cushioned comfort. Soft insert on the heel offers a more flexible fit. Lightweight pebax outsole with a combination of bladed and conical studs. G.S.F. (Gradual Stability Frame) technology. For use on firm, natural surfaces. WEIGHT: 7.6 oz.