I found this when one I follow posted this link to a fashion show:
https://www.instagram.com/p/CUm_inTldw2 ... =copy_link
Out of those on the runway, two had mid length shiny boots (rubber or PVC?) and one had PVC/vinyl look very tall black form-fitting glossy boots.
Glad to see this in fashion, just hoping for those mid length shiny boots to make it from fashion to commonplace.