A very necessary thing, especially if there are problems with the spine. I experienced the same Waist Triner. I put it on when I do general cleaning. The loin then does not hurt and the effect of the sauna is noticeable, the fat leaves the sides well. Only I have another model, also in the form of a top: FeelinGirl Neoprene Sauna Suit Tank Top Vest. See here https://gadgets-reviews.com/review/833-best-waist-trainers.html in this article this model is described in detail. There is also a simpler device, not only for the waist, but also for arms and legs. Read, there is a lot of interesting information.