Originally Posted by patrickBOOTH
Ultimately I'm not set on navy flannel, but I'm set on heavy.
If you are thinking navy flannel, go all in and get a navy chalkstripe. It is hard to get a more perfect business cloth than that. Harrisons used to have a good one and I am sure it is still carried. The key is to get a really blue, blue. DB for Boss level. I think there is a great one in Royal Wedding (Astaire wears it on a date with the dancer in his show). I also saw a fantastic one on an old guy at a cocktail party- one of the best DBs I have ever seen. Then there is, of course, mine.
Plain navy flannel doesn't really interest me because they are usually pretty solid rather than heathered, though the "char blue" Fox one is kind of cool (and also, not navy).