I have learned to use cotton thread for piecing and poly for FMQ and long edges like the binding. I see in Joann's there is a generic 100% polyester thread on a cone....$2.89 for like 3000 yds. But looking at name brands , their 100% poly is like 800 yds for about $8....or there abouts possibly less yds.

Anyway, my question is this...what's the difference? Is generic polyester same as name brand polyester? There is nothing else to discriminate in the content...they both just say 100% polyester. Granted there is one from Germany and one from Italy, the generic is USA or Mexico.

Coats and Clark poly covered poly...again, like 300 yds for $4-ish. I was told years ago that cotton covered poly was the best for reducing fluff and it was try, but they dont' seem to make that anymore or at least don't sell it at Joann's and I can't find it anywhere else.



I know poly has a tad of stretch where cotton doesn't which is why they say cotton for piecing (don't want any stretching there) and poly for FMQ and binding lengths as a tad of stretching there is helpful.

And I know it is the machines preference as to what it "likes".

So...what's the diff? Is one poly better than the other and if so, why? Is polyester polyester and you are just paying for the name? Thanks for any input!