177 thread count per square inch
1 out of 4 isn't bad I guess. A more pioneering answer might have looked like this:
Merino wool, 'Superfine' Twill (or open)
Warp: 24 cross band yarns 16-18 turns per inch
Weft: 24 open band yarns 10-12 turns per inch
Finished cloth 72" with 44-45 picks and 54-55 threads per inch
190z per yard.
Since most of the tensile strength is needed lengthwise, you want tighter warp yarns, but this has the tendency to create a directional pattern in the weave, so to account for that, you'll want to either increase the density of the weft with a higher pick count or use a looser turned yarn. etc etc
....The knowledge of that is more important than knowing the make up of the cloth
For typical installers yes.
Not for pioneers of greatness such as yourself.