This is the foundation of the UGG Collection. These are the original, authentic sheepkin boots made for ultimate comfort and warmth. Uppers: 17mm Grade “A” twinface Sheepskin with raw edges, sueded heel guards and nylon binding. Suede heel guards have signature woven UGG label. Insole: Genuine sheepskin sock that naturally wicks away moisture to help keep feet dry. Outsole: light and flexible molded EVA bottom with a patent protected outsole design. Shaft is approximately 11 3/4 inches tall.