I buy Ron loc the 404 and 403 ( one is the bleached and the other the unbleached) , the numbers are on the end of the bolt. I typically buy them by the bolt. It is their permenant press , pre- shrunk ( but there is still a bit of shrinkage) .
I like as it does not wrinkle nearly as bad as some of the others, has a nice weight, and the shrinkage is comparable to other premium cottons.
That company make many different grades/quality so do read the end of the bolt.