With the Thunder Bay Texapore, you can conquer any terrain. The Vibram Arctic Grip sole offers the best grip on all surfaces, thanks to a thoughtful combination of sole elements made from a proven winter rubber compound for low temperatures and specially designed rubber and fiberglass lugs. This is especially effective on wet ice and slippery paths. The winter shoe is lined with very warm and soft Primaloft fleece, keeping your feet warm in temperatures as low as -40 °C. Beneath the grippy nubuck leather of the shoe lies a waterproof, sustainable, and breathable Texapore Ecosphere membrane.