The basis of the idea was to take a classic moto jacket and tweak it for a car cabin: mesh-lined sleeves, extra accordions on the back and elbows, more stretch under the arms for reaching to shift gears, things in this vein. It's livable. You don't have to contort into it and taking it off after a long drive won't leave you in the shape of a "C." It's still made of cowhide for the classic tough feel and look, but is constructed with thinner aniline leather for more comfort and less heat buildup.
If you share the company's sentiment that there is a dearth of reasonably-priced driving jackets with rider styling, then this might be your answer. You can find the M1A
here, and Pagnol's moto-oriented products
here.
