Columbia Men's Titanium Daska Hiking Boot 100% Synthetic and leather Features Omni-Tech waterproof and breathable membrane Contour comfort 3D footbed with AgION anti-odor treatment Injection-molded, full-length polypropylene lasting board Poured polyurethane midsole with metal shank for torsional rigidity and support Vibram rubber compound outsole with aggressive lug tread pattern