The Serta Arctic Premier Hybrid mattress is the perfect combination of all-night cooling and individualized support. Powered by Serta's exclusive Reactex technology, a unique three-part cooling system that pulls heat away from your body and deep into the mattress, so you sleep cool all night long. Underneath layers of premium memory foam, a layer of 2000 individual micro coils, and an advanced coil system work together to gently embrace and support every curve of your body.