Does your Vargas longline try to roll down?
This doesn't happen for many people, but if your underbust measurement is under the waist measurement, then the elastic on the top hem won't be tight enough and can try to wriggle down.
Amaryllis saw us talking about this last week, and sent us her solution:
"These are cheap party shop bracers, because that's the only way I could find leopard print bracers. You can also get them in teeny shops like Claire's Accessories, but the nice quality men's ones don't tend to work well because you can't shorten them enough. Although they also look great with the roll on girdles and nothing else! The trick is to clip them to the thick elastic at the top of the girdle and not onto the powernet where the metal could do damage, and to attach the back clip before putting the girdle on."
I think that both No:Where in Camden market and Libby Rose might make good quality versions especially for you.
Want to find a girdle? Check out the shapewear section!