It is made out of thin navy blue non-stretchy corduroy, using the old favourite Burda 7767 with a few modifications... the addition of two breast pockets with arrow head flaps, and the double welt/patch pockets I showed you yesterday. And a curved hemline. And I used brown snaps instead of buttons. The collar facing, yoke facing, flap facings and welt pocket lining are all in a contrasting cotton, woven in a tiny plaid design of beige and black.
So here's the thing... I don't know if it qualifies as a shirt or a jacket, or both.
It is made using a shirt pattern, and can be happily worn buttoned (snapped?) up and on its own... thus earning itself a "shirt" label.
But also; being made of sturdy corduroy fabric, and also wearable unbuttoned and open over other shirts with his hands shoved in the pockets, it comes off as kinda jacket-style... thus attaining "jacket" status.
There must be a name to properly describe garments like this without having to resort to the hyphenated.
my tutorial for doing those combination welt/patch pockets just below