The new Serta® Sheep Retreat™ mattress delivers long-lasting comfort to your front door in our smallest carton ever. Thanks to the unique combination of Serta® Gel Memory Foam, Serta® Transitional Support Foam and Serta® Foam Core you can get that sleep-til-noon rest you’ve always wanted. "Serta® Gel Memory Foam: This unique gel memory foam contours to the body for cradling comfort and allows airflow to keep you cool and comfortable throughout the night".