Features of the Merrell Men's Alpine Sneaker Mid Polar Waterproof Boot Full grain leather and canvas Upper Metal hook traditional lace closure Bellows tongue keeps out debris Rubberized toe and heel for durability and protection Breathable fleece lining Kinetic Fit Base removable contoured insole for flexible support 200 Grams M Select WARM lightweight, tow bulk Insulation keeps you comfortable Molded nylon arch shank for midfoot support and flexibility EVA foam Midsole for stability and comfort Rubber Outsole for reliable traction