The Serta Perfect Sleeper Mackay Firm mattress features Serta’s Cool Action™ Gel Memory Foam and new 886 Custom Support® Firm Premium Wrapped Coil Innerspring. This mattress also features two layers of Serta’s Support™ Foam-This foam combines gentle cushioning with extra support, for more firm comfort.
Within The Mackay Firm mattress you will also find BestEdge® Foam Encasement- This system is designed to provide superior edge support while helping prevent sagging and edge roll-o