They weave carbon fiber into your carpets to ground out static electricity that used to cause shocks. They started with copper fibers first but it got expensive and carbon worked even better. I know this because I used to own a carpet cleaning company and became a certified IICRC inspector for warranty claims. I had to learn about every fiber used in carpets and the effects of chemicals on them during cleaning etc. Also to test them for what PH could be used to clean them. Maybe carbon which is much cheaper would be a better and cheaper alternative. Tje type of carpet is called an ESD.