Full Foam System – Includes a 5.5-inch open cell foam core designed to offer spinal support while maintaining flexibility. The open cell structure promotes airflow and good breathability. Tight Top Comfort – Contains a 2-inch layer of solution foam designed for temperature control and decreased motion transfer along with a 2-inch layer of high luxury foam offering elasticity and thermal support. Embossed Cotton Woven Fabric – Removable organic cotton embossed mattress top has a zipper sewn into the encasement for easy cleaning purposes and over airflow to mattress surface.