Just FYI, here is the reply from WAWAK. "As for the Gutermann thread that is 100% polyester thread and it is made in Germany. This is a sew all thread." And I made a mistake in the zipper price - a 24" zipper is 58 cents because the quantity discount does not apply during the buy 2 get 1 free sale. Sorry for any confusion. And all their #3 nylon zippers are on sale.