Serta's Classic Elite 14"" Plush Mattress provides a cooling and supportive surface that delivers the trusted comfort of Serta. Cool Twist Gel is swirled directly into a breathable foam that promotes airflow and heat dissipation which are both conducive to a deeper sleep. Individually wrapped coils in concert with Serta Gel Comfort Xd Foam provide contouring and cradling support to help reduce the pressure build-up that can cause discomfort and disrupt a peaceful sleep.