The Arctic fox lives in some of the most frigid extremes on the planet but does not start to shiver until the temperature drops to −94 F (-70 °C). This fox lives at the Como Park Zoo in St. Paul, MN. It is -19 °F there today, with the wind chill it's -30°F. Our average December temps are low 12°F to high 27°F. So, this is unusually cold for us, but not for the Arctic Fox. They endure the cold with their dense, multilayered fur, which provides excellent insulation, a system of counter-current heat exchange in the circulation within the paws to retain core temperature, and a good supply of body fat. Its paws have fur on the soles for additional insulation and to help it walk on ice. The fur of the Arctic fox provides the best insulation of any mammal. They also have such keen hearing that they can determine exactly where a small animal is moving under the snow.