What Is Seamless Underwear? Always find yourself -- worrying about a visible shapewear line when you wear tightly skinny shirt? -- so itchy when you wear a bad underwear but you have to stay calm? -- feel uncomfortable when you wear a thick undershirt? Slim and shaper vest is an ideal choice for a man who wants to look his very best every day 1. You can slim with exercise and a good diet. And our product help you do better - to have a nice shape! 2. Flattens abs instantly without exercise, does not lose its elasticity while wearing. It hides bulges, bumps and rolls making your body appear slim. 3. Reduce your belly size and enhanced pressure on the belly, supports weary backs and helps improve posture. Our Body Shaper T-shirt: Have function of shape body. On the inside are powerful layers of Nylon & Spandex tightly knitted together flattening your chest and stomach. Ergonomic slimming and tight X-Shape back designed to shape the body.