UGG Classic Nightfall boots Chocolate 5359 is made with 100% premium twin-faced sheepskin that wicks moisture away from your feet. The wrap around lace feature adds a fashionable touch with wooden beads at the end and finishes the boot. A removable and replaceable sheepskin insole gives extra comfort and warmth.. The heritage UGG Boots Tasman woven tape on the back of the boot adds a little something special to this tall boot.