UGG CIERRA Black Leather Tall Zipper Boots Size 8.5 Ugg® Cierra Tall Grained Black Leather Knee Boots. The boot is a western style made from grained textured leather. The knee high boot is a staple for any womens winter wardrobe and and this classic look boot is perfect. Black Grained Leather Decorative leather heel cap 15 ½" shaft height Foam insole lined with sheepskin Rubber outsole Great worn condition