BACKGROUND: Despite advancements in implant technology and surgical techniques, achieving long-term implant stability in breast augmentation remains challenging, particularly in cases where enhanced soft tissue support is required. OBJECTIVE: The chestnut technique was developed to enhance implant stability and address soft tissue support-related complications by incorporating a structurally supportive soft tissue framework. This study aims to describe the surgical steps of the chestnut technique and evaluate patient-reported outcomes following its application. METHOD: This retrospective study included 60 female patients who underwent primary breast augmentation between April 2020 and November 2024. Implants were placed in a customized subpectoral pocket, ensuring superior and inferior muscle and fascia coverage with pectoral fascia support at the midsection. Patient satisfaction was assessed using the BREAST-Q module preoperatively and at 1 year postoperatively. RESULTS: The mean follow-up period was 31.8 months (range: 12-56 months). No cases of implant malposition, rippling, or animation deformity were observed. Minor complications occurred in 5% of patients and were successfully managed with conservative treatment. The mean BREAST-Q satisfaction score significantly increased from 23.44 ± 10.20 preoperatively to 84.46 ± 9.90 at 1 year, with similar improvements in psychosocial and sexual well-being (p < 0.001). CONCLUSION: The chestnut technique provides a safe and effective approach to primary breast augmentation, particularly in cases where enhanced soft tissue support is desired. By optimizing implant stability and minimizing displacement-related complications, it serves as a reliable alternative to conventional methods while ensuring predictable and aesthetically favorable outcomes. LEVEL OF EVIDENCE IV: This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/0026 .