I tried it out at the Gym it worked just fine did al lot of sweating. Gives good support and compressed excess fat and skin. I wear it under a t-shirt. Sweated a lot , my work out shorts were soaked after work out. I wear black shorts so it is not noticed much. We are working out, so to sweat is expected. So yes it does what a sauna does makes one sweat. I rinse it off at home in the shower after I'm done with my workout and then let it hang dry on a hanger in the shower stall. Its dry in a few hours. I notice positive changes in my mid section from the sauna vest. I think it is actually helping to burn fat and or drain excess water as I work out with cardio and weight lifting for body building. I have never sweated so much in my 2 hour work out and the sweat drains off into the back of my black work out shorts not so much the front, but my undershorts are all wet from the sweat when done with my workout. Must be from when I set down on a weight machine seat to pump some iron. Of course I'm wiping the seat off after use. This one I have now is without the attached waist best. It does the job and it is worth it. I rate it a 5 star.
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