A white dress shirt is the standard, but a black shirt is also acceptable.

A white dress shirt is the standard, but a black shirt also an acceptable option.

Men should wear a suit with a conservative dress shirt and tie, even during the hottest seasons.

That means, don’t wear tennis shoes with a dress shirt, or combine sweatpants with a blazer.

In comparison, a general description used in another consumer price index for an equivalent item might be “men’s formal shirt; long sleeved”.