Made from A-grade Australian sheepskin. The classic of the tall ugg boots with side Zip. The new design double layer lightweight rubber sole improves the durability and grips to allow you to wear them indoor and outdoor. These UGG Boots are made from Australian sheepskin material, making them highly insulated towards both heat and cold, which means your feet will never be cold or sweat. The thick fleece that traps warmth and provides supreme cushioning around the entire foot.