Get Ready For Fall With These Stylish UGG Boots UGG Boots are made of sheepskin, with fleece on the inside, and are known as incredibly warm boots, which can be worn without socks in the coldest of weather. "UGG" means boot in Australia where they have been popular for years. They range in height from ankle to knee, vary in color and come in many styles, such as clogs,ugg boots sale free shipping, boots and slippers. What outfits go with UGG boots?