UGG Over-knee Boots combine 17 mm sheepskin warmth with a topical water‑repellent finish and a lightweight sugarcane-derived EVA sole for high-coverage winter wear. Key attributes: Black | Nero | Sheepskin | Water-repellent finish | Insulating shearling lining | Lightweight EVA sole | Shearling lining (17 mm) | Shearling insole (17 mm) | Suede leather heel counter | Overlock stitching | Over-knee shaft | Embossed UGG leather heel label | Fabric trim | Dimensions & fit: Shaft height: 38.1 cm | Composition & care: Sheepskin (montone) — 17 mm | Sheepskin lining — 17 mm | Sheepskin insole — 17 mm | Suede leather (heel counter) | EVA sole (sugarcane-derived) | Polyester (fabric trim) — 100% | Leather (heel label)