Ugg - Tiburon (Black Patent) - Women's: Leather uppers for long lasting, comfortable wear. Sheepskin insole. UGG uses only the highest quality, grade "A" sheepskins, evident in the plush fleece. 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. UGG footwear is designed to be worn barefoot to maximize the benefits of the sheepskin. Fit should be snug, but not uncomfortable as fleece footbeds form to each individual foot. UGG fleece wicks moisture away and allows air to circulate, keeping feet dry.
Category reference at Zappos.com:
Women's > Women's Casual > Casual Flats > Casual Flats - Slides/Mules