Balance Natura Thin Delta 217 is a triangle shaped thin silicone breast shaper that covers the whole breast comfortably, creating a flawless silhouette, for whether you've always been naturally uneven, or have had a lumpectomy or reconstructive surgery and need a little help filling the cup of your bra. Comfort+ temperature equalizing material in the back helps provide comfort all day so the breast form doesn't feel hot against your skin.