Free flaps are a surgical technique used in reconstructive surgery where a piece of tissue, including skin, muscle, or fat, is removed from one part of the body and transplanted to another area. This tissue is carefully detached along with its blood vessels and then reattached at the new site, ensuring a healthy blood supply for healing. This method is often employed in cases of trauma, cancer surgery, or congenital defects. Free flaps can improve both function and appearance, making them a vital option in procedures involving areas like the breast, face, or limbs.