The healthiest mattress supports spinal alignment, reduces pressure points, and maintains its structure over long-term use. There is no single perfect mattress for everyone because body weight, sleeping position, musculoskeletal sensitivity, and heat/sweating tendencies vary widely. However, the core principles are consistent: medium-firm support that fills the lumbar gap, controlled cushioning at the shoulders and hips, good airflow, and high-quality materials that resist sagging. For allergy-prone individuals, hypoallergenic fabrics and easy-to-clean structures are beneficial. Mattress health should also be considered as part of a system: the right base and pillow matter. If you wake up with pain, change positions frequently at night, or experience fragmented sleep, your current mattress likely isn’t “healthy” for your body and should be reconsidered.