Regional Products of the Flanaess - Cloth and Fur
Blue = Fur
Red = Cloth
As can be seen the origional resource map shows a strong interconnection between areas exporting fur (almost all the northern realms with the exception of Blackmoor and the Snow Barbarians. The same is reasonably true regarding cloth production and export.
Fur in this case can be guessed at as referring to heavy winter furs rather than the inclusion of pelts, skins or hides.
Cloth production and especially exportation seems much more questionable. It is so widespread that it makes me wonder who is buying the exports?