A heather-gray undershirt is invisible beneath a white overshirt.

If you need to wear a white collared shirt, white golf shirt, or any other white shirt you can kind of see through, a heather-gray shirt will not show through a white overshirt (heather gray is a light gray). I'm no optics specialist, but I've worn it and it works.

Great for job interviews, day-to-day at the office, funerals, weddings, and business casual.