What if we told you we combined two winter faves (our Adirondack and Butte Boots) into one? This year, we're celebrating 25 years of our 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. Waterproof. Waterproof membrane bootie construction. Waterproof leather. Waterproof suede. Gusset. Leather upper. Cuffable shaft, Rear pull tab, Front pull tab. Recycled polyester laces. 17mm curly UGG®plush 80% upcycled wool, 20% lyocell lining or 17mm curly UGG®plush 60% upcycled wool, 40% lyocell insole, Faux fur lining made from 100% recycled polyester fibers. 17mm UGG®plush 60% upcycled wool, 40% TENCEL Lyocell sockliner. Poured PU footbed incorporates at least 50% bio-based content. Sugarcane EVA midsole. Vibram outsole with ICETREK rubber compound. Cold-weather rated to -32°C, Xerogel insulation. Vibram Logo on outsole sidewall, The UGG® Logo on tongue. RN 88276. UGG® Men's Adirondack Boot XXV Leather Boots in Black, Size 17