I have seen/felt a close-up mat that is supposed to be made in Japan.
It is black on top with a light green underside. It is very flexible and it seems to remain in perfect condition even when severely folded. The material is rather spongy.
Two performers I've seen using it were either very vague about where I could get one, or did not want me to know (for reasons which are unclear to me).
The mat may be related to Shigeo Futagawa, but a google search on Japanese matters is very hard where I live.
A last hint is that the mat may be rather expensive. anyone who can point me in some direction?
(I do have several high end close-up mats, but I am looking for this particlar one...)