Fully waterproof boot with waterproof elastic and sealed seams. Injection molded Vibram rubber outsole and PU midsole with patented SPS at strike zones for all-day comfort and shock absorption. Self-cleaning outsole design proprietary to Blundstone. Lined with 200 grams of Thinsulate™ insulation. Polyurethane midsole for comfort. XRD® in the heel strike zone to dissipate heel strike shock. Removable sheepskin footbed for warmth and comfort. Highly resistant to oil, organic and inorganic acid. Hidden stitching in the heel. Leather lined. Our rubber soles are not designed for extreme cold or icy conditions. Sole traction is reduced in conditions below freezing and may slip on icy surfaces. Winter Thermal All-Terrain #2241-