The Men's Ducan Knit High GTX Hiking Boot boasts sock-like comfort thanks to Mammut's Georganic 3D Technology, which provides a 3D elastic knit upper that adapts to shape and offers excellent ventilation. Gore-Tex's Extended Comfort laminates the knit upper to provide rugged waterproofing and breathable comfort. Underfoot, the Ducan features Mammut's Flextron Technology to balance impact absorption with flexibility fit for technical terrain. The Vibram rubber sole ensures traction when that tricky terrain gets slippery.