The hidden button down collar is a covert cousin to the button down collar.
Because the hidden button down collar employs hidden button loops under the collar instead of having the buttons go through the collar itself.
On the underside of the collar, you will find a loop to which the button is fastened (see picture below).
The end result is a streamlined button-less profile, but with the security of a buttoned collar.
Why choose a hidden button down shirt collar?
The answer is a matter of personal choice. Some people do not like two buttons protruding from their collar, while others like the simplicity and utility balanced with classic collar aesthetics. If you are frustrated with a collar that does not sit properly and seek a streamline-look, then you should consider a hidden button down collar dress shirt.
Although it is best to always wear a tie when wearing a suit, this is perfect if you tend to wear a suit without a tie.
By doing so you can be assured that your collar will look crisp at all times without shirt collar stays or a protruding button (see picture below).