Natrelle implants come in a range of volumes and widths so surgeons can find the size that best fits the patient's body type and expectations. The procedure is done by placing textured or smooth implants behind breast tissue or under the chest muscle. Smooth implants are used in the majority of breast augmentation surgeries and the implants are able to move after they are implanted. Textured implants have a rough outer surface that prevents the implant from moving freely. After the implant has been placed, the incision is carefully closed. Patients can choose to have saline or silicone based breast implants placed during surgery.