Investigators will be randomizing women with a BMI > 40 kg/m2 in a 1:1 ratio to either NPWT (the PREVENA Incision management therapy system Pre 1001 Us) or standard dressing after their cesarean delivery at MedStar Washington Hospital Center. The NPWT will be left in place for a minimum of four days but not to exceed seven days. The standard dressing is typically removed on postoperative day one or two. The primary outcome is a wound complication defined as the formation of a wound infection, seroma, hematoma, separation, or dehiscence from delivery to 4 weeks postpartum. Investigators will also administer a patient satisfaction survey regarding their wound healing experience.