Photo by The Half Blood Prince, some rights reserved. Notice how the width of the modern suspender have reduced to a thin strap. This has been possible with the advent of better material and fastening to revolutionise the way to, well, hold up your pants!
Below is a fine example of changing your look with suspenders.
The suspender makes your wardrobe far more flexible. If you've lost weight recently but haven't the time to replace old clothes, just snap on the trusty braces.