With iComfort, cool comfortable sleep is the priority. Multiple layers of cooling technology and groundbreaking carbon fiber-infused memory foam make for the coolest sleep most comfortable sleep ever. iComfort memory foam is designed to offer superior pressure point relief and amazing back support. The CF 4000 features our best temperature management techonlogy with the max cool cover, carbon fiber memory foam, Everfeel Supreme memory foam for superior pressure relief, plush comfort, and support. The CF 4000 also has our revolutionary new Air Support foam that will make you feel like you are sleeping on a cloud.