SLIMMING COMPRESSION: This vest fits TIGHT to MAXIMIZE RESULTS and provide extra support. It generally runs true to size but If you're BIGGER / TALLER or want some extra room when taking it off WE RECOMMEND PICKING 1 SIZE UP. COMFORTABLE & DURABLE: Made to wear at work, gym or anywhere in-between, this tank top molds and moves with your body during workouts or everyday activities. You can wear it by itself or under your outfit - you'll be SWEATING OFF POUNDS in no-time. FEEL THE BURN: Wearing this vest during ANY physical activity creates a hot-sauna like experience including many of the same scientifically proven health benefits. (Increased calorie burning, detoxification, improved immune system, enhanced blood flow, faster warm-up & recovery times, greater release of endorphins etc.) Put it on & you'll INSTANTLY feel the heat. SUPERIOR QUALITY: Fully machine washable thanks to advanced composition of polymer & spandex fabrics. Super flexible and quick to dry with an anti-slip silicon lining so it stays in place with your every movement.