This UGG Ultra Tall also comes with one pair of boots can be removed or replaced sheepskin insoles. By a removable and replaceable sheepskin insoles, latex and foam to improve comfort, heat preservation can be effective inside. This section is not part of the materials used in leather boots have waterproof function. The UGG Ultra Tall Boot is made with 100% premium twin-faced sheepskin that wicks moisture away from your feet. The lugged outsole and removable insole is great for both comfort and function. These sheepskin ugg boots are extremely warm, soft and elastic, for the sheepskin have the capability of warm keeping and quick heat dissipation. The lugged outsole and replaceable insole are also great for both comfort and function.