Derila Ergo Pillow provides effective support for many side sleepers, depending on individual needs. People with very specific requirements may need a custom solution. However, for those experiencing neck pain, shoulder pain, or poor sleep quality, this pillow is designed to help address these common issues. Take a full week with this pillow. It takes time to adapt to alignment. There... https://www.researchgate.net/publication/404500468_Derila_Ergo_Pillow_Reviews_2026_Tested_Results_for_Neck_Pain_Side_Sleepers