Those are paper, and I have a package of it already. I use them to clean negatives. Problem with these is that they absorb liquid very poorly and they just tend to push them around. Fine for using with cleaners that evaporate quickly like neg cleaners but not so nice for lens cleaners.
I clean and reuse microfiber cloths. That scratch with embedded grit stuff is true every time after the first time. I wash them and dry them by themselves so that they don't pickup any additional grit in the process.