The Ice Cutter Boots from Red Wing Heritage were originally built to meet the needs of people living and working in harsh northern climates. Oil tanned Otter Tail leather uppers are stain , water , and perspiration resistant, allowing them to last longer and look better. Natural wool insulation keeps your feet warm and protected from winter's fury. Cork midsoles conform to your feet over time for comfort, and a steel shank throughout the midsole offers support and stability on any surface. To help meet the demands of working in cold, icy terrain, Red Wing used Vibram Lug TC 4 Plus soles to provide traction.