CUSTOM underbust white satin steel boned corset. Depop White Satin Steel Boned Underbust Corset with Front Zip Real steel boned underbust corset from mesh with embroidered front and 26 Steel Bones Satin Heavy Underbust Corset N8846 White Steel Boned Underbust Corset Cincher Glamour Boutique. This white satin underbust corset cinches your waist hard and holds all night without giving out on you. You zip up, walk in, and the room adjusts. Eight spiral steel bones keep the shape locked while the front zipper lets you get in and out fast without a fight. The kind of piece you plan a night around.