For all your winter needs, UGG updated their best seller to perform in even harsher conditions, with a range of high-tech benefits and a new fit created specifically for movement. The waterproof Adirondack III features an outsole designed to stay flexible in freezing temps, extra warming insulation, a cushioning insole, and a cold-weather rating to -32˚C (that's -25.6˚F). Ideal for the mountains, the city, or anywhere in between – this boot will last you years and years.