This is a boxy overshirt in crisp cotton poplin. The cloth is light and tightly woven, with a dry hand and a soft crinkle that shows up as you wear it. The color is a muted earthy brown.
It has a point collar, a button front with dark buttons, and a straight hem. The cut is wide through the body, with a relaxed shoulder and long sleeves that end in a plain cuff.
Wear it open over a heavy tee, as shown here with dark trousers, or buttoned up as a shirt. It's light enough for layering in spring and fall. Size down if you want a closer fit.