An internal bra can help support the lower or outer implant pocket in selected patients, especially in revision cases, weak tissues, or when implants have already drifted too far to the side. However, it does not correct the underlying chest wall shape. With a slightly pigeon chest or pectus carinatum tendency, the chest wall itself can push the implant direction and affect cleavage and side position. For a first-time augmentation, the most important factors are careful implant width selection, pocket dissection, fold control, and choosing a size that your tissues can support. Internal bra material may be useful if the surgeon feels your tissue support is weak or the lateral pocket needs reinforcement, but it is not necessary for everyone. An in-person exam is needed to judge whether your anatomy needs reinforcement or simply precise implant and pocket planning.