I LOVE THIS THING!! My posture has immensely improved and my neck pain is GONE. After I first put it on it didn't really pull my shoulders back enough, so I contacted the seller and they were super nice explaining how to use it. I now pull the straps further down (until my shoulders are where I want them) and then I close the band around my waist instead of around my bra line. Really so happy with it, I can wear it under my clothing but the strappy back also makes it nice enough to just wear in the gym over my top! HIGHLY recommend, great seller!