From UGG, the Metro Peak Waterproof Leather Cuffable Cold Weather Winter Boots feature: Waterproof leather upper Water repellent materials GORE-TEX internal membrane bootie Weather Rated -32C 10mm UGGplush™ upcycled wool, TENCEL™ Lyocell collar Leather vamp Cuffable shaft Shaft and upper textile made with recycled polyester fibers and nylon fibers Embossed UGG® logo GORE-TEX woven label Non-wicking laces with pull toggle and metal lace D-rings Rear pull tab UGGextreme™ reflective silver TPU print on webbing heel pull Recycled textile lining, 8mm fluffy poly knit fabric lining made with recycled polyester fibers 3M™ Thinsulate™ Insulation made with recycled polyester fibers 10mm UGGplush 60% upcycled wool, 40% TENCEL™ Lyocell sockliner Woven label with UGG® logo on insole PU foam footbed incorporates of Susterra® plant-based compound and PU from petroleum Midsole incorporates sugarcane Vibram ® outsole with ICETREK rubber compound Lightweight and textured rubber mudgard Vibram® Traction Lug technology Approx. 11 boot shaft height Approx. 18.5 boot shaft circumference Imported.