My father took me to Boston when I was real small for a space exhibited. There was also a traveling movie props exhibite in the next museum over. So on our way out we checked it out, we saw a bunch of costumes and one of them was the slippers. I remember my fathers shock on how bad of shape they were in. This had to be... At least 25 years ago. I don't know if these are the same slippers, the article says 10 pairs were made. But the ones we saw were literally falling apart