I'm thinking about the cooler days that lie ahead this Fall, and on weekends an odd jacket isn't always the best choice for running errands. But some form of coat is necessary if only for the pockets.
That's the kind of occasion when a shirt jacket comes in handy. The one in the photo is of unlined 14 ounce Minnis flannel so it's warm enough and will even take a little rain. The four pockets take care of the eyeglasses, sunglasses, cell phone and cigar paraphenalia that don't fit in my trousers. And my budget appreciates that shirt jackets can be made to measure for a fraction of the cost of a canvassed jacket.
Of course, made to measure jackets are also supposed to fit. I was trying it on in the photo, which is why I'm wearing a spot effect flannel over houndstooth trousers in the first place. This one is going back to the tailor for adjustment as it arrived with the sleeves an inch and a half too long, but it will be ready for service by the time the weather turns.