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iSeries® Expression Firm


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  • Experience the benefits of our gel memory foam technology with a firm mattress. It features our Cool Action Dual Effects® Gel Memory Foam to help relieve pressure while providing targeted support and enhanced cooling comfort. Two layers of Serta® Support Foam rest under the Cool Action material, allowing you to experience the benefits of this advanced material in a firm mattress.



    Your iSeriest® Sleep System mattress comes with a 10-year limited warranty.

    Comfort Assurance

    We want you to make your iSeries by Serta purchase with complete confidence. We know that even after making a careful selection, sometimes people may need a different level of comfort. That is why your iSeries mattress purchase is backed by our 120 Day In-Home Trial Policy.


    Approx. Mattress Height

    • 13.75"

    Support System

    • Duet Coil Individually Wrapped Coil-in-Coil Support System (1008) with BestEdge® Foam Encasement

    Top Upholstery

    • Cool Action Dual Effects® Gel Memory Foam
    • Serta® Support Foam


    • FireBlocker® Fiber
    • Pillo-Fill®
    • 1½" Serta® PillowSoft Foam