The Ladies Tank with Laced Back is 6 oz., and a 95% cotton and 5% Spandex blend for great stretch and fit. A built in bra provides extra support. The front features studs and decorative grommets, while the plunging back has satin laces that criss-cross the upper back. These shirts make an excellent base for heat transfer designs, and come pre-packaged in packages of 12 assorted sizes S-XL.