A bra carries you like a grocery bag held by its thin handles. This tank hugs the bag instead. The molded cups, the wide, flat straps and the long, snug body all share the weight, with no wire, band or hooks, so no one spot carries it alone.
It says "Shaper" in the name, but it isn't tight like a girdle. It's made to hold you and then leave you alone. No part of it fights your body.