For Neater shirts

These things are very old school. They've been around for a very long time.

We used a different version of this in the Marines, except they wrapped around your legs and clipped onto your socks. Sucked when they came unclipped as they inevitably whipped you in the nuts.

when I was in the military they sold a version of shirt stays that would hook over your foot. They weren't as long as the ones that clip on your socks and if you wore them for long periods of times they would make your foot cramp up from the pressure.