Less than six weeks after welcoming son Reign, Kourtney Kardahian is showing off her super-slim waist on Instagram.
The "Keeping Up With the Kardashians" star posted a pic of herself wearing a waist trimmer, writing, "Gettin' it right, gettin' it tight...with my waist shaper! #waistgangsociety."
Kourt isn't the only Kardashian to use the Premadonna product to help her shed those unwanted pounds!
Kim and Khloe Kardashian also have shared pics wearing the waist cinchers.
According to the company's website, the band will not only shape you while you're wearing it, but also allegedly stimulates weight loss.
And the famous sisters are not alone -- Jessica Alba told Net-a-Porter she "wore a double corset day and night for three months" after giving birth to her second child. "It was brutal, it's not for everyone. It was sweaty, but worth it," she added.
What do you think of this waist-training trend? Sound off below!