Get free shipping and sales for the Ugg Kids Birch Boot Toddler/Youth AfterDark Footwear Very stylish UGG Australia boot. High quality sheepskin upper. Fine woolen sheepskin breathes, wicking heat and moisture away to keep your feet dry and at body temperature indoors and out. In cold weather the soft wool fibers act as a natural insulator. In warm temperatures the soft fibers act as a nature air conditioner. Thick, natural fleece on the removable insole molds to the unique shape of your foot creating a natural arch support.