The Vest or Waistcoat has been a standard part of a man's wardrobe from rich to poor.  It can be worn with any outfit adding a touch of class. (Kyle - Class Act Tuxedo Model)

Tips for wearing a vest: 1) A vest should extend past and cover belt buckle, 2) leave last button undone, 3)shirt beneath should be well fitted, and 4) wear it with confidence!