The Letto mattress in this Collection combines the clinically cooling benefits of RespaGel Infused, ThermoCool Fabric & Respa Airflow Foam for maximum comfort, breathability, and airflow. With Respas unique RespaForm Pocket Spring 2000 Spring System and robust Foam Encapsulation for added edge to edge support. Sleepfresh Technology with a natural anti-allergen is also included keeping dust mites and bacteria at bay while you get a clean refreshing nights sleep.