Victoria's Secret Style Secret U-Plunge Backless Push-Up. Size C. Unused. My wife opted to wear a different dress to the function so this was not used. Style Secrets. U-Plunge Backless Push-Up bra. Wear up to 25 Times! Now with Infinity Edge so it's virtually invisible under clothes. Wear up to 25 times! Material :84% Nylon 16% Spandex Color: Nude