That's sooooooooooooo cool. I was lucky to have a fair bit of time talking to him and Sam Manicon about 8 years ago when I helped out at the opening of an overland company.
It is (was) my Hein Gericke jacket liner. It was at least 20 years old and the jacket is long gone but it made a great waterproof liner incase of showers. I'm so gutted that I've been on ebay looking for a replacement