It's the same as suspenders or chargers. They are elastic implements with darts at the ends, which are used to prevent the pants from falling out. Pull inflection, which means pull, pull, hold. That pull or that hold.
Plural of braces ( various meanings ) .
Them strapless, also known as tirantas, streaked and chargers are the two strips, usually elastic, that is is used to hold the bra and other garments as blouses and blouses ombligueras.