Sweat Shaper™ tank tops are styled in a special blend of compression and polymer fabrics that seal in your natural body heat so you sweat more, shed more water weight and get results fast! Lightweight and comfortable to wear under or over clothing, they instantly shape and slim your figure. Great to wear while exercising or performing everyday activities. Machine wash. Polyester, spandex and polyurethane. Men specify waist size: S/M (30″-36″), L/XL (38″-44″), 2XL/ 3XL (46″-52″).