Neck pain often stems from poor spinal alignment during sleep, which prevents muscles from fully relaxing. A supportive pillow should fill the gap between the head and mattress, maintaining the neck\'s natural curve. Contoured memory foam and adjustable shredded foam are effective materials for providing this necessary structural support. Side sleepers generally require a firmer, higher loft to keep the neck neutral, while back sleepers benefit from thinner, contoured designs. Selecting a pillow based on your primary sleep position can significantly reduce morning stiffness and long-term cervical strain.