2078971 Columbia Men's Expeditionist Extreme The most insulated and protected Expeditionist boot. Built for the harshest environments to keep your feet warm and dry. 400 grams of insulation and Omni-Grip Ice for the ultimate winter boot. Upper OutDry waterproof, breathable construction. Omni-HEAT Infinity reflective lining. Full grain leather, with scratch and rubber protection, and 400 grams of insulation. Midsole TECHLITE+ Single density foam midsole delivers a responsive underfoot cushioning experience while providing superior comfort and stability on the trail. Outsole Omni-GRIP Ice Fiber-rubber outsole with advanced traction on ice and snow.