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 Platform Sandals:
Platform sandals are sandals with a thick, raised outsole where both the heel and the toes are raised, thus providing height to the wearer. Platform sandals may also have an elevated toe area with a separate heel.