UGG Winter Boots combine a waterproof suede upper with a GORE-TEX internal liner for reliable cold-weather protection. Built with a Vibram® ICETREK sole and UGGplush™ lining, they’re designed for traction and warmth in icy conditions. Key attributes: Black | Nero | Suede | Waterproof construction | Breathable GORE-TEX membrane | Cold-weather rated to -20 °C | Slip-resistant Vibram® ICETREK sole | Internal GORE-TEX sock/liner | UGGplush™ lining and insole (17 mm) | EVA midsole for cushioning | Mudguard element | Suede upper | Toe reinforcement with mudguard | Reflective detail on side reinforcement | UGG® logo on mudguard, Vibram® logo on sole, GORE-TEX fabric label | Composition & care: Suede (upper) | GORE-TEX membrane (internal liner) | UGGplush™ lining (17 mm): regenerated wool 60%, Lyocell (TENCEL™) 40% | UGGplush™ insole (17 mm): regenerated wool 60%, Lyocell (TENCEL™) 40% | EVA midsole (sugarcane-derived) | Vibram® ICETREK rubber sole