The arc4life cervical linear traction neck pillows are designed specifically for patients who are experiencing neck pain, stiff neck, herniated disc, bulging dis, arthritis or degeneration in the neck. This neck pillow features a neck roll and a special neck traction "V" side which gently stretches your neck. You can use either side to sleep on. With the arc4life traction pillow you can sleep on your side or on your back. There may be an adjustment period with this neck pillow.