Ergonomic WaterDrop Design Mainly Work on Neck Pain Relief: The cross section adopts a unique waterdrop design, which combined with the traditional neck roll pillow and cervical pillow , for remarkablely neck pain relief. The concave is for firmly neck support, neck brace for cervical spine alignment and natural head transition area to prevent congestion and dizziness. Gently stretch your cervical spine during sleep and deliver effective result on ending neck pain in the very next morning!