When the forecast turns serious, this is the boot that earns its keep. The Ugg Adirondack Boot XXV pairs a waterproof leather and suede upper with a plush wool-blend lining, so feet stay dry on the outside and warm on the inside through snow days and long winter walks. Lace-up hardware lets you dial in the fit over thick socks, and a lugged outsole holds its ground on packed snow and icy sidewalks. Built in the tradition of Ugg's most weather-ready silhouette, in Black and Chestnut.