Craving firm, supportive sleep that eases back pain. This extra firm mattress topper is engineered to align your spine and evenly distribute weight, relieving pressure points while its high-density, resilient materials adapt to your body-offering targeted comfort for shoulders, hips, and back, no matter if you sleep on your side, back, or stomach. It keeps sleep fresh too: breathable, airflow-enhancing materials maintain steady circulation for a comfortable environment, no extra cooling add-ons needed, and its premium high-density foam resists sagging, retaining shape and firm support long-term. Plus, it's CertiPUR-US certified, free from harmful substances, and rigorously tested for safety-so you can enjoy healthier, more restful nights with total peace of mind. Material: Polyurethane.