Used to even out asymmetrical ******* during pregnancy by just wearing an insert in one cup (was one to one and a half cup sizes smaller on one side). Works extremely well and made me feel much better about my silhouette. Took a few minutes to get used to the added weight on one side, but didn't notice it the rest of the day.Especially helpful in bras where you can take cup inserts in and out so that the pad doesn't rest directly on your skin, like the Heavenly by Victoria Lounge Unlined Plunge Bra. I put the breast enhancer inside the fabric of the bra on one side.