Anyone know where I can buy Button airport friendly suspenders? I know there are several clip on brands but need the button suspenders that are airport friendly.
If you search Google (or your favorite search engine) you'll find a ton of results for "airport friendly suspenders" (that's the first non-sponsored link) or "airport friendly braces" (same again, braces is UK English for suspenders). These have plastic buttons and so will not trigger the metal detector alarm.
But, wearing normal braces/suspenders is perfectly OK. Airport staff are used to that and the worst that will happen is you'll get a secondary search where they use the handheld metal detectors to confirm that you don't have any other metal on your body.
I seem to recall there was a Kickstarter (or similar) for non-metal suspenders/braces but I can't find it and, as I've shown above, there are plenty of other options.