Melodi Matrix™ in Breast Reconstruction

Inclusion Criteria:

* Female.
* Age 22 or older at the time of enrollment.
* Is scheduled to undergo unilateral or bilateral mastectomy (including prophylactic) with immediate two-stage post-mastectomy alloplastic prepectoral breast reconstruction.
* Is able to and willing to comply with the study requirements and providing informed consent.

Exclusion Criteria:

* Has prior history of neoadjuvant radiotherapy.
* Has had prior history of failed tissue expansion or breast implantation at the intended reconstruction site.
* Has an active abscess or infection requiring antibiotics anywhere in their body within 30 days.
* Has a Body Mass Index (BMI) \< 14 or \> 40.
* Is pregnant or is nursing; or plans to become pregnant during the course of the study.
* Has any connective tissue/autoimmune disorder or rheumatoid disease.
* Has known allergies to study device materials.
* Is participating in another interventional research study that may interfere with study endpoints.
* Has limited life expectancy or co-morbid conditions, social/psychological problems, or cognitive impairments that precludes participation.
* Has a medical condition or is taking medications that would result in elevated risk and/or affect the validity of the study.
* Intraoperative assessment demonstrates unfavorable conditions (i.e., poor mastectomy skin flap thickness or viability) for immediate, two-stage post-mastectomy alloplastic prepectoral reconstruction in any breast.