In my opinion, it works like a flexible corset, as most shapers normally work, but this one has a tighter hold than most other body shapers I have tried. The boob section was so tight, I could not breathe and I had to cut out the lining, which does not affect the shaper at all, since it still has plenty of hold for the bust without the extra fabric. It really felt like I used duct tape really tight to hold down my boobs. Although it does not completely hold any bulges in like a corset, it is strong enough to smooth them down, kind of like wrapping yourself up with saran wrap. They will look more shapely, rather than malformed. I decided it was not for me because although it fit, it was a bit too tight and slightly uncomfortable, due to being a tight wrap, after wearing all day.