Waterproof AquaProtect© leather with sealed seams. Natural wool lining providing superior protection against cold temperatures and also allowing a good air circulation. Insulated felt insole. Removable Carbon foam activated insole. Cold Shield Comfort System, a multi-layer insulating system that offers a superior level of comfort and warmth. Lightweight synthetic rubber outsole anti-skid and flexible, even in cold weather. 12 inch shaft. 15 inch shaft when collar is rolled up.