We're all for killing two birds with one stone, so we're expecially psyched that it's shirt jacket season again. Yup, that's rightâ€”a shirt jacket is exactly what it sounds like. Just don't call it a shacket. This great transitional piece for fall is perfect for looking stylish in-between seasons. It looks like a shirt with the details of a button-down, but functions like a jacket adding warmth where and when you need it. Click through our list of The Best Shirt Jackets Available Now, and be prepared to look better than everyone else.