Ugg combined two winter faves (the Adirondack and Butte Boots) into one. This year, Ugg is celebrating 25 years of their Adirondack with the ultimate winter hero: Adirondack Boot Xxv. It features fully waterproof genuine leather and suede, Xerogel insulation that keeps you warm in temps as low as -32ºC, and a higher tongue height for even more protection. Infusing Ugg heritage with modern materials, this new edition of the Adirondack Boot still delivers the same Feel of Ugg you already know and love. Wear it on your outdoor adventures or take it to the city – this boot is ready for wherever winter takes you.