These shoes are lovely! Found them on top of a rubbish bin at a void deck. They were stuffed with plastic bags to retain their shape. An examination of the soles showed that they’re barely used. There was a tin of Kiwi shoe polish inside as well.
I think the reason why the previous owner threw these away is that the zips were stuck. It just needed a bit of lubrication. The Kiwi shoe polish is a good lubricant, so I lightly coated the zipper teeth with it. The zips work now.