Originally Posted by Claudio
flannel is longer, uncombed if you will, whilst the latter wool is combed and thus smooth. Flannel is a winter material whilst the other is not necessarily heavy weight. Hope that helps
Well, there is woollen flannel
and there is worsted flannel
, and they differ somewhat. I don't know which of the two the STP Samuelsohn suit is, but I'd guess it's the latter. In that case, the wool is, in fact, combed, although a nap is created as well. Thus, although it will look fuzzier than a smooth worsted, you will be able to discern the weave. It's more like a cross between smooth worsted and a true woollen flannel. Yarn number (Super 120s in this case) is somewhat independent of the flannel/worsted distinction.