Bare Essentials™ AirSlim® Retro-style Cupped Bra-free Thong Bodysuit

I was skeptical about the built-in underwire but it genuinely follows the breast shape without digging in, and the front boning gives enough structure that the plunge neckline stays put all night. The satin feels cool against the skin, so I wore it straight through a long dinner and barely felt it.

The liquid stretch satin looks sleek and feels nice against the skin, and the front boning does give some shape. But the underwire digs in a bit after a few hours, so it's not the most comfortable for all-day wear. It works fine for a short night out though.