From UGG®, the Aira Tehuano slippers feature: Suede upper Perforated vamp with woven leather strips 17 mm sheepskin collar 17 mm UGGpureTM wool vamp lining 17 mm UGGpureTM wool insole Molded rubber outsole Artificially dyed and treated real sheepskin from sheep or lamb (Australia, European Union or United States) Imported.