For side sleepers, choosing the right pillow is essential for maintaining spinal alignment and ensuring comfort. Key factors include selecting a pillow with a medium-to-high loft (4-6 inches), soft-to-medium firmness, and supportive materials like memory foam or latex. Breathable materials help regulate temperature, and adjustable fill allows for customized support. Ideal pillow types are memory foam, latex, buckwheat, or hybrid pillows, which provide adaptive support and pressure relief. Avoid pillows that are too flat or thick, lack support, or retain heat. The right pillow can reduce neck pain, improve sleep quality, and promote better breathing.