Let me start by saying I've tried at least a dozen shapewear brands, and these Underoutfit boy shorts are... complicated. The first time I wore them under a bodycon dress for a date night, I literally gasped at how seamlessly they smoothed my tummy and love handles. The 90% nylon/10% spandex blend feels like second skin - no sausage casing effect!

Here's the real magic: that silicone-embedded waistband ACTUALLY stays put. Unlike other shapewear that migrates south by hour two, these stayed firmly anchored during my 8-hour workday (including three coffee runs and a very enthusiastic Zumba class). The moisture-wicking fabric kept me surprisingly dry - no swampy feeling even in summer humidity.

BUT (and it's a big but), the butt seam situation is bizarre. Wore them under silk trousers for a presentation and later discovered the seams had created what I can only describe as 'butt quadrants' - like someone drew lines dividing each cheek into sections. Not the sleek silhouette I was promised.

Pro tip from painful experience: SIZE UP aggressively. I normally wear L/XL but needed 3X for proper compression without organ-crushing tightness. The legs do ride up slightly, especially during prolonged sitting, but nothing worse than standard shapewear.

Final verdict? These are my go-to for dresses and skirts where butt seams don't matter, but I'd never wear them under thin pants again. For $35, they deliver remarkable tummy control without making you feel like you're in a medieval torture device - just mind those cheek-dividing seams!