Serenia Sleep 2-Inch 7-Zone Memory Foam Topper, Cal King Premium 2-Inch visco elastic memory foam relieves pressure points, helping cradle the body and align the spine - Cal King 72 x 78 inch 7-Zone body comfort system therapeutically massages your body and provides a cushiony-soft sleeping surface to reduce tossing and turning Eggcrate wave patterns are specially designed to be more delicate by the feet and head and more supportive near the shoulders and mid-section. Open-cell cool memory foam sleeps cooler than traditional memory foam Temperature sensitive, hypoallergenic, spot clean only