I have to admit, I thought this thing was janky upon first seeing it on Amazon. I said there’s absolutely no way this thing works. There’s no way it’ll slim your waist. People just don’t realize how much sweat they sweat out. WRONG, this thing is actually amazing. I used it during my workout and felt a lot of support in my lower back and tummy. At first I was like ok, I don’t feel any different. I don’t think it’s doing anything. I took it off and instantly I felt the cold breeze from all the sweat I was drenched in. This belt was soaked! I worked out without it, to test the theory of do I actually sweat the same amount? Nope, it was a night and day difference. I haven’t lost inches off of my waist, but it has definitely contoured it. Highly recommend!