The Single Incision Laparoscopic Sleeve (SILS) is performed when the 4-5 incision laparoscopic gastric sleeve is performed, but with only a single laparoscopic incision through the belly button. The biggest difference between the two is the single incision (SILS) has the added benefits of little to no scars as well as reduced postoperative pain because of the single incision, which allows for a quicker recovery.