The UGG Boots is sewn onto what is normally a plastic sole, and so the boot is a boot that is worn outdoors as well as indoors. Usually the boot is worn outside any trousers so that the boot is visible in it's entirety, and as Uggs are available in a variety of designs and colors they are very conspicuous. And now a fashion footwear item.
UGGs Boots are very comfortable and warm, and are wonderful to wear in winter. However as they are made from a natural material, namely sheepskin, they breath well, and so are also comfortable in summer.