Eight Sleep offers a technology-driven bed cooling system comprised of three elements: a memory foam mattress, a mattress cover (called the Pod Cover) that zips onto the mattress, and a central unit (the Hub) that circulates water through tubes in the mattress cover for the purpose of temperature control. The mattress itself is not a “smart mattress.” While it is designed with temperature regulation in mind, the system's smart technology is actually in the mattress cover and the Hub, which you can purchase separately and use on your existing mattress.