u/Kairi6v6

I bought these puma shoes second hand a while ago ( I think they are puma speed princess ) But I've never worn them because the first time I've tried them they started to fall appart. They seemed new but I guess they are old and must have never been worn. Is there something I could do to stop them from decaying ? I really want to wear them but I'm scared all of the inner plastic coating thing will fall off.