Montrail Men's Sierravada Outdry Waterproof Hiking Shoe 100% Textile-and-Synthetic Imported Synthetic sole Synthetic hiking shoe with outdry waterproof breathable upper Fluidfoam midsole for enhanced cushioning and flexibility Fluidguide technology for support and a smoother ride on trail surfaces Trailshield outsole protecting your feet against rocks and debris 5mm lug height for more aggressive traction