The shirt is intended to be worn tucked or untucked. That's both. It has a fitted shape, so when tucked in, it rolls tidily into the trouser — but it is also casual, so when untucked it won't look like you've stepped out in an office shirt. It is a standard length: falling a couple of inches below the belt-line on most people.
The shirt has a button-down collar of moderate size and roll. The collar skims the neck-circle at the sides and back, and elongates as it reaches the front — and then the buttons step in. When the points are fixed to said buttons, the collar rears up and the satisfying bulging roll of the button-down reveals itself.
The shirt has a front of six horn buttons — each of them, in their own natural way, different from one to the next. Meanwhile, every significant seam on the shirt is what's known as a single-needle, lock-stitch, French seam. They take twice as long as standard seams, but look nicer, wear better, and last longer.
The shirt has a chest pocket, with a narrow section on the inside-edge — for a pen, pencil, or chip fork, say — which is established with a long bar-tack. Bar-tacks also appear at the top corners of the pocket, for great strength, as well as several other parts of the shirt subject to the most wear and tear.
The cuffs of the shirt are unapologetically tight, so the sleeve can't step over the line that is the start of the hand, and they fasten with a single button. The corner of the cuffs is gently curved, echoing the collar.
The question is, "why would younotwant to wear corduroy?" It is exceptionally soft, particularly its interior, but, in being a traditional working cloth, is also very hard-wearing. And, despite being warm on cooler days, it is eminently breathable, so is great on warm days — especially this feather-light variant.