Free Overnight Shipping - Step into pure comfort with this sheepskin slipper. Ugg sheepskin is naturally thermostatic and therefore will keep bare feet comfy in temperatures as low as -30°F to as high as 80°F. Designed to be worn barefoot to maximize the benefits of sheepskin. Fit should be snug, but not uncomfortable. Footwear will give a little as fleece footbeds form to each individuals foot. Ugg fleece wicks moisture away and allows air to circulate, keeping feet dry. From the Ugg Home/Spa Collection. Care and Cleaning Instructions Moccasins, Slippers.