I've just thought about this now... What if @spiermackay experimented with brushed merino wool flannel shirts, both in solid and gingham/plaid? Could even just add it to MTO now and try it OTR next fall/winter. I don't remember the last time I've seen a wool flannel out in the wild, mainly all brushed cotton now, along with a boxy fit. Although not sure who here would buy one