Is there any winter boot more iconic than the SOREL Caribou? No offense to our other fine boot brands, but we would be hard-pressed to think of one. The Caribou is the definitive piece of winter footwear whether in the driveway, in the woods, or on Church Street after a blizzard. The concept is simple, the execution, flawless: a rubber lower mated to a nubuck leather upper, both parts waterproof and seam-sealed. A removable ThermoPlus™ felt liner is comfort rated to40 degrees Fahrenheit, and is easily taken out for drying.