The Calm Sky features Cool Twist® Gel Foam combined with a system of individually wrapped coils for cool, comfortable support night after night.
Serta® PillowSoft® foam
Cool Twist® Gel Foam
805 Individually Wrapped Coil Support System
In addition to providing contouring, cradling support, this system of up to 805 individually wrapped coils features Serta’s BestEdge® Foam Encasement technology—an extra-deep foam rail to help reduce edge roll-off and extend the sleep surface.
Cool Twist® Gel Foam features cooling gel which is swirled directly into breathable foam designed to promote airflow and heat dissipation.