Quote:
Originally Posted by
FidelCashflow 
OK. I don't get how this is possible. I've owned numerous jackets, some bespoke, so I'm sure they're at least reasonably fitting, and they ALL restrict motion in the arms.
If I walk with my outstretched straight in front of me, shoulder height, I can feel the fabric pulling across my back. If I hold my arms straight out to the sides, shoulder height, the shoulders of the jacket lift up and sit somewhere around my ears. The arm shields prevent you from reaching sideways without interfering with them, and the shoulder pads prevent you from reaching up without interfering with them.
I can't comfortably drive with 1 hand on the top of my steering wheel in a jacket, because the arm doesn't let me comfortably reach straight-out and up. I can't comfortably lean over and reach into the glove compartment and fish around for stuff because the arm shield will not comfortably let me reach straight out to the side.
Your response mystifies me. I don't get what you're driving at (pun semi-intentional). Just as an experiment, I tried just about every reaching, stretching and extension movement with my arms I could think of, and I found, with my jacket unbuttoned, as it would be were I seated and driving, the jacket posed no impediment at all. Anything I could do in my shirt sleeves, I could do in the jacket. And this is not even one of my best fitting jackets from my buddies in Kowloon--it is my old knock-around blazer (for casual Friday) that I bought at modest cost from Nordstrom back in 1992.
Men have, in fact, been driving cars while wearing overcoats, dusters, frock coats, suits coats and sport coats since the very introduction of the automobile, well over a century ago, without apparent problems. A number of other posters in this thread have mentioned doing so. So, I remain baffled how this causes such a problem for you in particular.