US Patent 7013512 Combination pressure release ergonomic pillow

A combination pressure release ergonomic pillow comprised of a body of the pillow having its top surface in a curve complying with ergonomic requirements of the human head and neck, a channel on one side or multiple channels on both sides, a slot at bottom of the body of the pillow, and insert(s) to be inserted into the channel(s); and a support inserted into the slot to support the back of head of the user; the insert being retractable to adjust the height of the pillow body to define optimal pressure release curve according to the individual user to protect the cervical vertebrae of the user.