We have this uber soft knit polo in a butter yellow shade.  It is outstanding!  It has the button down classic collar with lightly padded shoulders and a cuffed hem.  It is great on its own or layered.  Try it under the Summer Tweed Jacket.  Fit is true and doesn't cling.
Esqualo Collection
78 viscose, 22 nylon
Cold delicate cycle, lay flat to dry