Hanes Oh So Light Contour ComfortFlex Fit Wirefree Bra (G521). The Hanes Oh So Light Contour ComfortFlex Fit Wirefree Bra G521 has lightly padded seamless t-shirt cups with sheer patterned sides, straps that convert to a crossback, and tag-free comfort. Hanes' Oh So Light Contour ComfortFlex Fit Wirefree Bra is made of nylon/spandex.