From UGG®, the Men's Classic Mini GTX Boots feature: Waterproof suede upper GORE-TEX internal membrane bootie Rear pull tab 17mm UGGplush™ (60% upcycled wool, 40% TENCEL™ Lyocell, 100% recycled polyester backing)lining 17mm UGGplush™ 60% upcycled wool, 40% TENCEL™ Lyocell insole Foam footbed Sugarcane EVA midsole Rubber heel plate with The UGG® Logo Vibram® outsole Imported. Styling Notes: Best for:  Heavy rain, Heavy snow Cold-weather rated to -20°C