Belly Dance, established 5000 BC... give or take a few years. ;)
 
Women's Flowy Tank - Flowy lightweight racerback tank top for women. 65% polyester and 35% viscose (marble colors are 91% polyester/9% cotton). Flattering, flowy and lightweight, this stylish tank top is super-soft to the touch and a comfort to wear. Featuring an A-line body and racerback cut, the flowy tank top is a wardrobe chameleon. Versatile enough for a workout or for a night on the town, this one is a must-own. 
 
*Runs small, size up.