UGG Classic Ultra Mini booties combine a compact ankle silhouette with leather outer and a wool-blend lining for everyday cold-weather wear. Key attributes: Black | Leather | Insulating wool lining | Closed | Flats | Ankle boot silhouette | Casual styling | Composition & care: Outer: Leather 100% | Inner: Wool 49%, Synthetic Fabric 33%, Polyester (PES) 18% | Sole: Rubber 100% | Wipe clean with a damp cloth. For deeper cleaning use a professional leather cleaner. Do not machine wash; avoid prolonged exposure to moisture..UGGs feel snug at first, but the lining expands with wear. We recommend your usual size.