Not having seen any adverts for Shapermint camisoles I shall ask Google.
I do however have a shaper underslip. One day, a few years ago I needed to wear the slip. What I had forgotten was, one should step into the slip and pull it up.
I put it on over my head. Because it's elasticated, once under my arms it rolled up like an elastic band.
So tight was the band it would not go back up nor could I pull it down.
I struggled for a very long time, escalating from laughing hysterically to feeling terrified!
How I eventually got free of the slip I don't recall, but it was an enormous relief. 