Generally this would be called a "deconstructed" jacket. They're best reserved for casual wear because they do look softer and wrinkle more. Ideally pair them with a shirt with a soft collar and jeans or chinos. I have a few from Luxire that I like. Usually when people talk about shirt jackets they mean something with a shirt collar. It looks like a shirt, but is looser, has more pockets, and is made of a heavier fabric than a regular shirt.
6/30/15 at 1:24pm