Hmm. I found an S for only $14. It's the lighter of the two washes. Should I jump on it or hold out for an M? Or the darker wash? You're right, I probably would not wear it closed, though I might wear it the way it is pictured, with the top buttons open.
I don't mind a rigid jacket. My moto jacket is 100% cotton. It zips over the bust (it basically squashes my chest in order to accomplish that, so I don't wear it that way, I'm just saying it's possible!)