This styling look uses the newly arrived BRITISH OFFICERS SHIRT - TYPE 2 CHECK.
Personally, I preferred the other colourway (Khaki), but when I tried wearing this Navy one, I found that this colour actually suited me best.
The first thing that comes to mind is pairing it with military pants or chinos, but I deliberately went for dark tones to make the shirt stand out.
It's made of 100% thin cotton, so you can wear it comfortably in the coming seasons. If you're looking for a long-sleeved shirt that you can wear in the summer, be sure to check this out.