NAOMI & NICOLE. Waist Cincher Tube features revolutionary Back MagicÂ® technology, with flexible stays to shape your waist and support your back. Double panels provide extra firm control to help shape away back fat and muffin tops, and help define your waist. Wonderful EdgeÂ® silicone on the back waist and hem prevent slippage and riding up. This shaper provides a smooth look under clothes and is step-in so no need to mess around with fastenings.