There is a lot of buzz out there right now surrounding the "internal bra" - a mesh support designed to be placed inside a woman's breast as part of a breast lift procedure to support the tissue in its new higher, more youthful position. While this news may be exciting for women who suffer from sagging breasts as a result of weight fluctuations, pregnancy, or simple aging, it's a bit too early to go out and sign up for the surgery.
The device is not yet approved by the U.S. FDA, and even if and when it does receive approval, there are concerns. Like breast implants, the internal bra is a foreign substance being introduced into the patient's body. There is always a possibility for inflammatory reaction or infection, either of which has the potential to lead to (cosmetic or health-related) disaster.
Another surprising misperception I've encountered surrounding this technology is that it allows for a "scarless" breast lift. Of course, this is not true. The mesh insert is normally inserted in conjunction with a traditional breast lift to provide additional support. Therefore, the usual breast lift incisions apply. Even if the internal bra does make it possible to minimize incisions, "scarless" is not an option. (After all, the mesh has to get in there somehow.)
If you're looking for a "scarless" breast lift, there are a couple of options out there that may come close. For women who experience only a mild-moderate degree of breast sagging (and don't mind going a bit bigger on top), breast augmentation surgery may do the trick to lift the breasts. of course, there are still going to be incisions, but going through the belly button (TUBA approach) or underarm (trans-axillary approach) can make your scars near-invisible. On the other hand, if breast implants are not an option for you, some small degree of improvement may also be possible with non-surgical skin tightening.