Your new go-to for any weather, the Caulder is built with waterproof leather and packed with cold weather-ready features. Rated to withstand temps as low as -20˚C, this hiker boot features soft wool lining, a layer of fleece, another layer of Thinsulate® insulation, and a sole that stays flexible no matter what, even in freezing ice and snow. Waterproof leather and wool Full Polartec® Power Grid™ fleece lining  UGGpure™ wool lining  enerG Comfort System insole with fleece lining Treadlite by UGG™ outsole with white Spider Rubber pods  Thinsulate® insulation  Cold weather rated -20 C  Seam-sealed construction  4” shaft