I was skeptical about the "discreet" claim, but this vest really does disappear under a thin t-shirt. The back support is firmer than I expected and my posture has noticeably improved after a couple weeks of wearing it at my desk.
Wore this under a fitted dress to a wedding and nobody could tell it was there, which is exactly what I wanted. The tummy flattening actually holds up through a full day of sitting and standing, and my back didn't ache by the end of the night like it usually does.
Wore this under a fitted dress to a wedding and nobody could tell it was there, which is exactly what I wanted. The back support genuinely helped me sit up straighter through a long dinner, and it never rolled down or dug in.