• Compression and support: This men's sweat vest acts as a lumbar support trainer, helping to increase calorie burn during exercise and reducing pressure on the lumbar muscles, in addition to supporting the spine. • Improved flexible design: Made with high-quality fabric and durable zippers. The fabric is soft and features two adjustable outer belts that provide a variety of tensions. The improved shoulder design makes it easy to put on and take off. • Double belt design advantage: This 2-in-1 waist trainer offers a more flexible fit in waist belt pressure, solving the discomfort caused by different sizes of a single belt in the lower abdomen. • High-quality material: Made of neoprene and nylon, this vest is soft, healthy, and moisture-wicking. Ideal to combine with a healthy diet and proper hydration. • Exercise tool for men: It can be worn under or over your regular shirts. If you're looking for a flat stomach feeling, a strong core, and a tight look, this sweat vest is your ideal workout gear.