Free flaps are tissue mounds that are detached from their original blood supply and reattached to another blood supply somewhere else on the body. There are many types of free flaps that can be used for breast reconstruction including the free TRAM, the deep inferior epigastric artery (DIEP) perforator flap, superior gluteal artery perforator (SGAP) flap to name a few. These flaps usually bring in more tissue to the chest than those brought in as pedicled flaps, or flaps that are still attached to its original blood supply.