Thread Count. If everything else is the same (weave, ply, mill, and type of cotton), higher thread count means a smoother, silkier, more expensive fabric. Thread count is often referred to with a number like 50s, 80s, 100s, 120s, 140s 160s, etc up to 200s. You would be excused for thinking that 80s = 80 threads per inch, but that's incorrect ...
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