Train Wedding

Whats that part on the wedding dress called that holds up your train during the reception?
After the ceremony when you dont want to drag around a long train, you lift it and hook it onto this button on your back/butt and it turns the dress into just a big cinderella dress. I need the name for it. Thanks!
It’s a loop that holds up the bustle, so I guess you could just call it the bustle loop.
Wedding Train pt 1
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