Technically more of a shaper than underwear, the Fabulous Fanny' brief by Va Bien Lingerie promises to lift and sculpt your butt - for a look that can be compared to months on a Stairmaster.
So what's the secret?
A specially designed elastic band is hidden at the waistline and wraps around the waist and then under the butt.
I know I'll be checkin' this out. Many others may be, too -- when I'm wearing it.