The Sorel Caribou Boot for Women is the original and best winter boot since 1972. This boot has a running reputation for warmth, durability and comfort, it will protect your feet through deep snow, harsh storms and the biting cold of long winters. Rated to -40 degrees below zero, the Caribou is the timeless choice for work and play in cold weather. The nubuck leather upper and handcrafted vulcanized rubber shell are seam-sealed for complete waterproofness and lined with a removable 9mm ThermoPlus felt InnerBoot that traps heat next to your foot, where it belongs. Underfoot, a thick rubber midsole insulates the boot from cold ground, while the Sorel AeroTrac non-loading outsole provides sure footing.