Steel Boned Off White Satin Underbust Corset Perth Hurly Burly Fashion Elegant White Satin Steel Boned Underbust Corset N9625 Underbust Corsets D White Satin Woman Steel Boned Underbust Corset C33S SKAF IMPEX. 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.