A back zipper is a slide fastener located at the rear of a garment or shoe. In footwear, a back zipper closure is mostly used in high top boots for women and is intended for esthetic purpose rather than functional.
About High Heel:
High heel are shoes which raise the heel of a shoe or boot between 2" to 4" higher than the toes. High heel shoes are generally limited to women's footwear and come in a variety of styles and designs. The heels on high heels shoes are also found in many different shapes, including stiletto, block, tapered, blade, and wedge.