Pro-Fit Adjust Soft Headrest Pads have a steel back plate covered with 1.5" thick comfortable foam and a removable smooth cover with a zipper on the back. The wings have an adjustable width feature that allows the headrest to capture the head and provides a better fit. Extremely strong adjustable locking joints, set it and it stays. Use with Therafin's Multi Axis or Surelock headrest hardware, or a headrest mounting bracket with a 1" diameter mounting ball. Does not include any mounting hardware.