UGG Boots Mens Sz 10 Waterproof Butte Winter Boot Style 5521 Black Fur Trim Lace Up These waterproof leather boots are designed to handle all the elements, with a rugged Vibram outsole. The soft, cozy lining is made from faux fur and plush UGGpure, a textile made entirely from wool but crafted to feel and wear like genuine shearling. Temperature-rated to -20 degrees Celsius Removable insole Leather upper/UGGpure wool and textile faux fur lining/Vibram rubber outsole