UGG Australia - Is the worlds premier brand of authentic sheepskin footwear and remains the leader in quality, innovation and style.  UGG uses only the highest quality grade "A" sheepskins, evident in the plush fleece and smooth hides.  Whether uppers are made completely of sheepskin or utilize suede or leather, every UGG product is fully lined with plush fleece.  UGG sheepskin is naturally thermostatic and therefore will keep feet comfy warm.