A front-opening shirt with attached, turn-down collar is adapted for wearing either closed-collar style as with a necktie, or in a casual, open-collar style in which no button, button hole, or other fastener is visible on the free ends of the neck band, thereby improving the appearance of the shirt for such casual wear. The collar is closed by means of a strap or tab which is mounted swivelably at one of its ends on a stud or button on the neck band hidden beneath the turned-down collar adjacent the shirt front, and connected by its other end to a similarly-hidden second button adjacent the other end of the neck band. The strap holds the overlapping ends of the neck band together and a necktie may be placed thereabout and tied at the front in a conventional manner. When the shirt is to be worn casually, the free other end of the tab is detached from the second button, swivelled about the first stud or button, and secured to a third button on the neck band beneath the collar inboard from the first stud or button.