Like new. Little to no signs of wear. Urban outfitters UO Zola Zip Platform Boot Women Size 9. A platform boot is a modern, combat-style women’s boot featuring a prominent front zipper, a center seam, and a chunky platform sole. Made of synthetic (faux) leather with a soft shaft, these boots are designed for a trendy, edgy look. They offer a 1.1-inch platform height and a 9.4-inch shaft, generally fitting true to size.