The UGG?Ultra Tall woman's boot is made with 100% premium twin-faced sheepskin that wicks moisture away from your feet. The lugged outsole and removable/replaceable insole is great for both comfort and function. The heritage UGG? Australia Tasman woven tape on the back of the boot adds a little something special to this tall boot. This boot is available in Black, Chestnut (Dark Tan), Chocolate (Brown), and Sand (Tan). Approximate boot shaft height: 12"" Approximate mid-calf circumference: 12"" Twin-faced grade A sheepskin with suede toe and heel guards Removable and replaceable comfort system insole is made of sheepskin, latex and foam for ""ultra"" comfort with a Mylar sockliner for warmth. Molded rubber lug cup sole for strength and durability on rugged surfaces