Adjustable Compression, Relieves Muscle Stiffness. 8" Height to give Proper Support to Waist. Excellent support during Physical Exercise. Helps Reducing Water Weight around Waist Wear it while you exercise or under your clothes (it's compact enough) to trim inches off your waist and lose weight naturally. The Neoprene Waist Trimmer Thermal Belt targets specific muscle groups (specifically your waistline), keeping them warm, and as a result, make you sweat by retaining moisture and increasing the temperature. Therefore, not only will you lose excess water weight in that area but the calories your burn to sweat will also contribute to your weight loss.