I was skeptical that a over the knee boot would actually reach my knee since I'm 5'9" with very long limbs but this was tall enough. The zipper is good which I'm not a huge fan of and doesn't actually zip, but I was still able to get the boots on (I have MS and it makes it hard to put on shoes). The back calf part is not PU but stretchy fabric but I guess that's ok too. Overall good deal for the price. Won't wear these a ton but they look cute!