UGG ADIRONDACK XXV LINED WATERPROOF BOOT CHESTNUT - MENSAdirondack Boot XXV, It features fully waterproof genuine leather and suede, Xerogel insulation that keeps you warm in temps as low as 32C, 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.