I wondered if I should get hooded or hoodless. I ended up getting the hoodless.

I doubt I'll wear it all the time. I tend to wear as little clothing as I can get away with. Right now, I'm wearing a short sleeved polo shirt in my office with no jacket or sweater.

So if I understand the latest theory correctly, you want the front and back of a cycling jacket to be windproof but the sides to be breathable. This lets your excess heat out, but since the sides don't normally get much wind, it won't let much cold air enter. Is that about right?