I am more inclined to call this as 'cyberpunk' or 'cyber goth' styles of clothing, rather than 'post apocalypse'. It would not at all be out of place within more sci-fi oriented movies such as The Matrix, Blade Runner, a marvel or DC superhero flick, or perhaps even showier sci-fi pieces like 'The 5th Element' and 'Valerian and the city of 1000 planets'.

IMO, if you want to look at real down and dirty post apocalypse high fashion, then you should be looking at Mad Max (especially the sequels), Waterworld (kevin costner), the Book of Eli, Avalon (by Mamoru Oshii), and if so inclined to, Tank Girl.