From UGG®, the Men's Chelsea Lug Leather Boots feature: Leather upper Elastic gore Textile lining made from 100% recycled polyester fibers with anti-odor treatment 10mm UGGplush™ 60% upcycled wool, 40% TENCEL™ Lyocell sockliner, Textile sockliner with anti-odor treatment, Twinsole™ interchangeable insoles Textile sockliner and foam footbed, poured PU footbed incorporates at least 50% bio-based content The UGG® Logo, heat embossed on the heel Sugarcane EVA outsole Imported.