Back Sleepers Back sleepers require gentle neck support that does not push the head forward. The Ergo Z Pillow maintains the natural cervical curve, promoting comfort and alignment. Side Sleepers Side sleeping creates a gap between the head and mattress. The Ergo Z Pillow fills this space, keeping the spine straight and reducing shoulder compression. Combination Sleepers For those who change positions during the night, the pillow adapts smoothly, maintaining support without losing shape.