Our new top-of-the line winter boot is our warmest ever. The waterproof full-grain and suede leather upper—complete with shearling cuff—combines with the ThermaFill® insulation to keep your feet dry and warm. The Vibram® outsole provides sure-footed traction.California residents, read the Proposition 65 WARNING California Proposition 65 WARNING WARNING: This product can expose you to chemicals including chromium (hexavalent compounds), which is known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov