A coat for someone who travels for work has a short and demanding list of requirements. Light enough to pack. Structured enough to put on when you land without looking like it has spent six hours squashed in a bag. Warm enough for wherever you are going. And made well enough to be worn straight into a boardroom or a client dinner without a change. That is a harder brief than it sounds, and it rules out most coats on most rails. We make travel coats in light wool-cotton mixes and fine travel-weight wools that manage all four.
What it has to do
The first thing is recovery. The coat has to shake out the creases of a long journey and look presentable without anybody finding an iron. That comes down mostly to cloth. A tightly woven fine wool-cotton or a travel-weight fresco comes back from being folded far better than a loose flannel or a plain cotton, which will hold every crease you put into it.
Weight is the second. A coat that weighs three kilos becomes a nuisance by the second airport and eats into your luggage allowance besides. A good travel coat in a 300 to 350 gsm cloth is light enough to wear for hours without noticing and packs down to a fraction of the bulk of a proper overcoat.
The construction follows from those two. A lighter canvas than we would use in a heavy overcoat, seams built so they press out cleanly, and details, collar, pockets, buttons, proportioned so they still look right after the coat has been folded, sat on and pulled out of an overhead bin.