High top, lightweight performance and aggressive grip make the waterproof X-Ultra Trek GTX ideal for fast backpacking and day hikes in rugged terrain. Salomon's lightweight advanced chassis, placed between the outsole and midsole, maximizes motion control, energy management and push through protection for an efficient, stable and responsive ride. Delivering optimal traction on varied surfaces, Salomon's Contagrip outsoles use the ideal combination of specialized rubbers for each specific use. Material: Leather.