90% Polyester and 10% Spandex [Upgraded Sweat Sauna Fabric]:This mens sweat vest is made of upgraded heat insulating fabric. Sauna suit generates heat reflection and heat cycle quickly, improves blood circulation, so you sweat like crazy within minutes of exercise, you can burn more calories to increase your workout. EXCELLENT EXPERIENCE Compared with inferior neoprene alternatives, the sweat vest does not smell, the weight is 1/2, very light, dries faster and is machine washable. PS: Please read the size chart before you make the purchase. We are happy to exchange one for you at no charge. [Comfort Fabric]:The men's sauna vest is made of two layers of inner and outer materials, 96% polyester fiber and 4% spandex on the outside, 100% polyurethane on the inside. The inner thermogenic polymer fabric increases your body temperature and promotes sweating. The outer high-performance compression fabric instantly slims and shapes your figure. Promotes sweating through exercise, makes your sweat triple than usual, accelerates fat burning. [Bodybuilding Function]:The tummy control tank top provides perfect amount of compression for the covered area, helps improve your abdominal and chest muscles, make your waist look slimmer and firmer, and also help correct posture during daily activities, make you look more energetic. Sweat body shaper is your ideal workout and fitness clothing. › See more product details Model: Size: Color: