This has been by far the best thermal vest I had. I use almost every day when I go workout. It really works and I lost some belly fat. I really feel like you are in a sauna. What amazed me is its sweat absorption. Where really all my sweat went after I worked out for 45 minutes, sweating like pig? I often ask this question. It really makes my belly burn like no other can. Believe me, it works, you have to try it.
https://www.amazon.com/dp/B07GRYBF1D