Earlybird Dual Cool 12" Medium Hybrid Full Mattress balances cooling performance with responsive support for a comfortable, medium feel. A breathable cooling cover and memory foam comfort layer sit atop a responsive coil core with polyurethane foam encasement to deliver pressure relief, edge support, and improved airflow. Compressed for easy delivery with bed-in-a-box convenience and made in the USA, it ships with a 10-year warranty and pairs with a box spring to provide consistent support.