Versatile fitness companion: For running, gym workouts, crosstraining, or casual wear, this sauna vest doubles as a body shaper and waist trainer, boosting core heat for maximum sweat output and muscle toning. Its sleek, modern design makes it suitable for everyday use under your clothes. Enhanced thermogenic workout: Mens Sauna Vest Waist Trainer uses advanced neoprene material to boost thermogenic activity, increasing sweat output during gym sessions or any exercise, helping to accelerate calorie burn and fat loss naturally. Double belt compression ensures support and heat retention around the midsection. Stable and easy maintenance: Constructed with quality materials, this Mens Sweat Vest withstands rigorous exercise and regular washing without losing shape or effectiveness, making it a reliable companion for consistent fitness progress. Ergonomic double belt support: Designed with two adjustable belts, this waist trainer provides tailored compression to sculpt your waistline, improve posture, and reduce muscle fatigue during workouts, giving you both comfort and effective shaping results. The sturdy zipper closure ensures secure fit without pinching or discomfort. Use scenarios: During cardio sessions such as running or cycling to boost sweat and core warmth. During weight training or crosstraining to support the midsection and enhance posture. Worn under daily clothes for a discreet silhouette and smooth appearance during everyday activities.