Waterproof all-weather boots in PU material. The insulating properties of the boots have been tested in the lab and they retain heat down to -15°C. The material contains air bubbles for better insulation. The boots also have both a lining and an insole in a wool blend that retains heat even if the lining gets damp. They are reinforced at the toes and ankle to provide better support for the feet, and have a reflective stripe at the top for better visibility in the dark. The outer sole is durable and has deep tread for a really good grip.