In new condition! COMPRESSION & SUPPORT:Mens Sweat Vest is like a lumbar assistance trainer, not only to increase fat calorie burn during physical exercise, but also to reduce the pressure on the lumbar muscles and support the lumbar spine during exercise. FLEXIBLE UPGRADE DESIGN: Higher quality fabric and more durable zippers. The fabric is softer, plus two outer adjustable belts (which has a good grip) provide a good variety of tightness/looseness. The upgrade design of shoulder make it easy to take on/off. SAUNA VEST MEN: This waist trainer vest is made of top quality neoprene and nylon, which is smooth, healthy, moisture-wicking, combined with a healthy lean diet and drink plenty of water. EXERCISE TOOL FOR MEN: This Corset training vest can be worn under or over your regular shirts. If you want a feeling of a flat stomach, strong core, and a fit look, sweat vest is your ideal workout gear.