The Serta Arctic Premier 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. The cooling technology is paired with layers of premium, high density memory foam that conform to your body and provide firmer support. The result is all-night cooling with the support your body needs.