Classic Ultra Mini A low-profile UGG Classic designed for easy on-and-off wear. The pre-treated sheepskin upper, plush interior and ultra-lightweight outsole provide the signature warmth and softness of the Classic family in a versatile ankle-height silhouette.Specifications:Upper: 17 mm Twinface sheepskin Treatment: Water-repellent post-applied treatment Lining: 17 mm sheepskin Insole: 17 mm sheepskin or UGGplush™Outsole: Sugarcane EVA or Treadlite by UGG™Shaft height: 3.5 in