Designed to offer control and precision when traversing rugged terrain, the R-Evolution combines a sole that adapts to a wide-range of surfaces with the comfort of memory foam and Sock-Fit XT to deliver the ultimate hiking boot. Calf leather Nubuck upper. Sock-Fit XT. Gore-Tex lining. Active medium insole. Revolution high-Density EVA midsole. VibramA(R) Fagus outsole. Weight: 680 g. Imported.