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 Designer Sandals:
Designer sandals are sandals featured in a broad range of design and styling that are distinguished by the brand name. Designer sandals are particularly well known, not necessarily for the shoe style, but more so for the designer from which they originate. Designer sandals will often be very fashion-oriented and trendy.