They were from Albert N1. Amongst many of his goodies that he supplied us with. He developed SARS and is recovering from it now. He did have only a limited amount of them. I luckily bought 2 sets and still have one in the box incase anything should happen to the 1st set. I always try to buy in 2's. I believe once he recovers you may be able to get a set of carbon fiber ones which are really hot also....