@Setok But I strongly assume that the mats of #Regupol different.
The Core development of Regupol is the recycling of Rubber products to sheets of milled rubber.
Those are used for all kinds of sports, acoustics, construction, flooring and stables for horses.
For sport .e.g the runway of berlin olympic stadium is made from Regupol.
So those sheets are the core for the mats, and then there is a canvas. For #Judo ususally vinyl, #Aikido perfers cotton to be able to slide on it without burns