Supportive, comfortable, with high airflow - experience the feeling of dream stay. Now you can extend the life of your current mattress - and make it more comfortable, with active airflow. The Serta dream stay ultra memory foam mattress topper offers 4 inches of ultimate comfort & support - infused with premium gel memory foam with a soft, textured cover. Together, they relieve painful pressure points and dissipate heat so you'll enjoy a deeper sleep.