Let me start by saying I’ve tried *dozens* of waist trainers, and the Nebility 2-Pack is a rare combo of firm compression and actual comfort. The double-layer fabric hugs my waist without feeling like a medieval torture device—I wore it for 8 hours straight during work (desk job + walking meetings) with zero rolling or digging.

The steel bones? Game-changer. Unlike cheap plastic boning that stabs you, these flex naturally with movement. I even wore it to a HIIT class (yes, really), and it stayed put while supporting my lower back during burpees. My posture improved instantly—no hunching over my laptop!

Sizing tip: If you’re between sizes, size DOWN. The XL fit my 40" waist snugly at first but molded to my shape after a few wears (and washes). Pro tip: Step into it instead of pulling over your head—way easier!

Under-clothes test: Seamless? Mostly. Under thin knits, I noticed slight lines, but with structured dresses? Magic. My muffin top vanished, and my waist looked 2 inches smaller instantly. That said, if you’re tall (like one reviewer at 6’2"), rejoice—the length covers from bra band to hips without riding up.

Cons? The black one in my pack arrived missing (annoying!), but customer service refunded me fast. Also, if you hate compression or have sensory sensitivities (like the ADHD reviewer mentioned), the tightness might take getting used to—try wearing it for short periods first.

Final verdict: For $30-ish? A steal. It won’t replace diet/exercise but gives instant confidence under outfits or during workouts. Just check your package contents ASAP!