Rib-knit bustier. Features adjustable straps and thick cups. Used 2-3 times. Please note: This is not suitable for those who find even regular bras a bit constricting (uncomfortable). I purchased this online, but there's no tag... I searched extensively, but couldn't find the shop, so I don't know the correct size. I think it might be a bit tight for those with a bust size of C cup or larger.