Serta Perfect Day iSeries(Applause Plush) Vantage Plush Mattress (King) Traditional firm feel with the benefits of gel memory foam Cool Action Dual Effects Gel Memory Foam helps relieve pressure while providing targeted support and enhanced cooling comfort Serta Support Foam creates a firmer feel Duet Coil Individually Wrapped Coil-in-Coil Support System responds to each sleep partner individually for cradling comfort and deep postural support Replaces #1 rated Applause model Replaces #1 rated Applause model -