Casio premiered in the MRG-G2000R two quite important innovations that, for the moment, will only be available in the most elite models of the brand. One of them is the incorporation of a new material for the resin belts, the Dura Soft Fluoro-Rubber, marketed under DuPont with the name of Viton, and under 3M with the name of Fluorel, and whose abbreviation is FKM (for the American ASTM), and FPM (for DIN / ISO). It is used for those pieces that require a high resistance to acids (although it can be attacked with sodium hydroxide), and it is the first time Casio takes it to their watches. Thus, it supports alcohols, salts, oils and mineral acids, although there are different degrees of resistance as well as, obviously, the proportion of its compounds. Some, for example, are more resistant to alcohols, while others resist extreme temperatures better (mainly, the low ones). Dura Soft seems to be, simply, the name that gives Casio (not to be confused with other materials such as Cordura, has nothing to do, I say because in some places I have seen that it was as if it were Cordura).
