PVC Leggings: Where Have I Seen Them in Fashion Before?

I've been hearing a lot of people talking about the joys of PVC leggings, and I have to say they look pretty cool when they're worn in a non-vampy, trampy way. (If you haven't caught on to the PVC legging craze, check out this post in Style Bubble.) However, since the minute I first set eyes on a pair of these babies, I couldn't help but wonder, "where have I seen these before?" Well, I finally figured it out. During season 3 of Project Runway (don't pretend you didn't watch), Jeffrey Sebelia created a black and white cocktail dress and paired it with a creation of a different sort, a creation that looked astonishingly like a cut up pair of PVC leggings. Hmmm. Was the trend brought on by Jeffery, or did other designers come up with the design on their own? Will we ever know the truth?