We just got back from my in-laws where we spent the weekend and had Christmas. My father-in-law who doesn't fly fish made the comment that he had thought about getting me some thread and stuff to tie flies with. Instead he got me a set of flies, he must have seen the flies I tie He was going to buy me regular thread like at Wal-Mart or something. I told him what we used was different, but I really wasn't sure what was different? I know some of it is already waxed, is that the only difference? Or do some of you use thread for sewing? I don't like to appear to be a complete idiot in front of my in-laws though after 9 years I am getting use to it.

thanks in advance,
hNt