It rides up, just like all the other spandex tanks
I have a couple of tight spandex tank tops from H&M and Zara. I hated wearing them bc they ride up and end up above your belly button. This feeling becomes a nuisance when you're constantly pulling the tank top down. Turns out that this smoothing tank is the same deal. It's the same material. I tried it on and it immediately rode up above the belly button.