Ferno-0819882 445 Head Immobilizer Replacement Head Pillow (1 Pair)The Ferno 445 Head Immobilizer Replacement Head Pillow (1 Pair) (#0819882) can replace worn or damaged head pillows on the Ferno Universal Head Immobilizer. The Ferno Universal Head Immobilizer has two PVC dip coated closed cell foam head supports, complemented by a universal attachment base and two robust head straps. It's also designed to minimize interference with X ray, MRI, or CT procedures.