Ultimate Smoothing for a Perfect Shape.​Playtex® 18 Hour® introduces its first-ever smoothing minimizer. Designed with smoothing cups and built-up sides and back to help minimize bust by up to 1.5.” It’s the perfect solution for ultimate smoothing. So, say goodbye to gaping blouses and undesired bulges, your clothes will fit better and look amazing giving you an added touch of confidence. 78% Nylon, 22% Spandex