Jiao Miao Mens Slimming Waist Body Shaper Vest Shirt 80% nylon, 20% spandex Notice : The T390 and T391 are more like a normal T-shirt if you want wear more comfortable , T390 and T391 are fit for you . The T107 T349 T389 T358 and T377 are better for body shaper . Made of high quality Nylon to stay elasticity and shape of body, which is tight and compress, please select one size larger if you want to wear it more comfortable . Slimming under shirt features firming panels to help trim and tighten your back and stomach Breathable & Elastic fabric-Made of high quality nylon / spandex, very elastic and breathable for improving blood circulation and fat burning, Instant flat big Belly and big Boobs-Special weave design on abdomen, instant flat the big belly, and strongly chest shaping to say goodbye to big boobs Revolutionary new body toning slim wear specifically engineered for men who want to look slimmer, trimmer and leaner Provides back support to promote better posture And invisible under clothing and Microfiber Smooth