Kylie Jenner, Kourtney and Khloé Kardashian Pose in Waist-Training Selfie

They’re getting ready for Christmas. 

Kylie Jenner shared a selfie on Instagram on Monday (Dec. 14, 2015) that features she and her sisters, Kourtney and Khloé Kardashian, sporting festive waist trainers. The three enjoyed a toning session together as they posed in super tight matching corset-style trainers to accentuate their hourglass figures. As if they need it anyway. “Posted up with my babes getting our waists right,” she wrote alongside the snap that sees Khloé pouting and Kourtney looking tiny.

A photo posted by King Kylie (@kyliejenner) on

“Sisters who waist train together stay fit together!!,” Khloé wrote, posting the same photo. The reality star is known for her love for waist trainers. Recently, Dita Von Teese even slammed celebs like Khloé for flaunting the corset-style method to slim their figures.

Meanwhile, Kourtney has been dealing with rumors that she and Justin Bieber are dating. After partying with him at The Nice Guy over the weekend and leaving his hotel room at 4 a.m, sources came forward saying that the two have been casually hooking up.