Inclusion Criteria:  A participant must 18 years or older and is scheduled for surgery in the prone position to be conducted at UCLA Santa Monica Medical Center.  Exclusion Criteria:  Patients who are not scheduled for surgery in the prone position. Patients with known allergy to the components of the Mepilex Border Flex (MBF) dressing which consists of silicone, polyurethane, polyacrylate, viscose, polyester and polyolefin.