Are you sure they're not old stock? Scott-Mathouser became Kool Stop AFAIK.I am not aware of the compounds Kool Stop is currently using. When Scott's original patent on the iron oxide formula used in the Gen-X pads expired Kool Stop did start using the compound. The Scott family has licensed the use of the Gen-X formula to Yokozuna in Japan and they are making the road and mountain pads and shoes using that. The old school block style shoes are still made in the US, using the same formula.