I look a full size smaller without sucking in

I tried on a dress I hadn't worn in two years and my jaw dropped. Instantly looked slimmer — not squeezed, not uncomfortable, just… smoother. The thing that got me is I could actually breathe. My old waist trainer felt like it was strangling me because all the pressure was crammed into one tiny band around my ribs. This vest spreads the compression from shoulders to waist so no single spot is doing all the work. I wore it to brunch for 5 hours and honestly forgot it was on. My friend asked what diet I was on. Girl, it's not a diet — it's engineering.