Sacrum Pressure Injury Prevention Study Using ALLEVYN◊ Complete Care in Adults at Risk of Developing Hospital-acquired Pressure Injuries in Critical Care Units

Inclusion Criteria: * Subject or legally authorized representative (LAR) provides written informed consent * Adults (≥18 years) at time of consent * Willing and able to complete all required study visits * Subjects admitted to Critical Care Units or Intermediate Care Units (may also be called step-down, progressive care, or high dependency units). Subjects may be identified in perioperative or emergency departments before moving to the appropriate unit. * Subject's Braden Scale score is ≤18 at time of screening * Subject is recruited within 18 hours of arrival to hospital (Emergency Department, perioperative area or Critical or Intermediate Care Units) * Subjects' life expectancy is ≥3 days (as assessed by clinical judgment within 24 hours of consent) * Subjects expected Critical and/or Intermediate Care stay is ≥3 days (clinical judgment) Exclusion Criteria: * Subject has participated previously in this clinical trial * Subject is currently participating in or has participated in a clinical trial within thirty (30) calendar days of day 0 which could impact the scientific integrity of the study * Subject has a medical or physical condition that, in the opinion of the Investigator, would preclude safe participation in the study. * Subject has a known sensitivity/allergy to dressing and/or adhesive components (e.g., sensitivity to silicone) * Subject has a medical condition or orders that, in the opinion of the Investigator, prevent repositioning (e.g., hemodynamic instability or unstable spine) or positioning which would exclude the supine position (e.g., prone positioning) (clinical judgment) * Subjects with orders for, or expected to receive orders for, prone positioning (clinical judgment) * Known extended period, prior to enrolment, without documented repositioning in the opinion of the Investigator. e.g., Subject has had ≥6 hours of known pressure on the sacral area, subject found down, extended operating time etc. * Subject is currently receiving end-of-life care or comfort care only * Subject has existing sacral skin injury or has irregular skin features (e.g., tattoos, pre-existing scarring, evidence of prior healed pressure injury, unusual anatomy such as dimples or bony prominences) which in the opinion of the Investigator, will interfere with the study assessments. * Subject has uncontrolled/unmitigated urinary and/or fecal incontinence (e.g., controlled defined as incontinence reasonably managed through the use of a device such as indwelling catheter, fecal management system, external urinary catheter, etc.)