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iComfort Intellectual EFX Reviews

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iComfort Intellectual EFX

Intellectual EFX is the mid-low model in the iComfort EFX of memory foam mattresses by Serta. The high-end model is Brilliant EFX, and the entry-level one is Aura. The remaining two models are Visionary EFX Cushion Firm and Visionary EFX Plush.

The key feature of Serta iComfort mattresses is Cool ActionDual Effects® gel memory foam, which is infused with beads of two kinds of gel, one for support and one for cooling.

The EFX collection uses EverFeel Technology (EFX), which adds a layer of EverFeel, a poly-foam which is sensitive to changes in room temperature. Serta claims that EFX keeps the same level of support and conformity in a wide range of temperatures.

Serta uses this cutaway view to illustrate the build of the iComfort Intellectual EFX:

_____Features of the Intellectual EFX --
1. Avantec Premium Performance Fabric with TENCEL® Fibers
2. EverFeel™ Technology
3. Cool Action™ Dual Effects® Gel Memory Foam
4. Serta Support Foam
5. Comfort Last® Foam Core with Ultimate Edge® Support

Avantec fabric in the cover is a blend of polyester (90%), lycra (2%) and Tencel® (8%). Tencel® is fibers extracted from wood pulp. It wicks moisture from the sleeping surface and cools by evaporation, thus controlling both moisture and temperature.

EverFeel™ Technology, described above, is to keep the support and conformity even when room temperature changes.

Cool ActionDual Effects® gel memory foam is infused with MicroSupport gel and MicroCool+ gel. MicroSupport enhances support characteristics of the open-cell memory foam. MicroCool+ regulates temperature, keeping the mattress from becoming too hot.

Two layers of Serta Support Foam add firmness to this memory foam mattress, bringing the firmness of the 11" high iComfort Intellectual EFX to Ultra Firm.

Support for the Intellectual EFX is provided by the Comfort Last® Foam Core. This high resiliency foam supports all the layers above, keeping them from bottoming out. This both offers orthopedic support to the sleepers and prolongs the life of the materials.

Ultimate Edge® Support foam encasement is the perimeter support for the support core and the comfort layers, as well as supporting the sleeping surface. This makes the top of the Intellectual EFX 100% usable and prevents roll-off.

iComfort Intellectual EFX carries Serta's 25-year limited warranty. The recommended foundations are the iComfort StabL Base (8" standard or 5" low profile) and the Serta Motion adjustable bases. This model is widely available through major chains and local and regional retailers, both in stores and online.

  • Mattress and Bed Set Model Name

    iComfort Intellectual EFX

  • Price Category


  • Listed Manufacturer


  • Location

    Serta International, Customer Service Department, 3 Golf Center #392, Hoffman Estates, IL 60169, 1-888-55-SERTA (1-888-557-3782)

  • Bed Classification

    Memory foam

  • Level of Firmness

    Ultra Firm

  • Inner Bed Composition

    HR support core, dual gel MF, EverFeel polyfoam layer, 2 support foam layers

  • Mattress Edge Support

    Foam encasement

  • Mattress Cover Composition

    Blend of polyester, Tencel and lycra

  • Total Mattress Height

    11 inches

  • Bed Foundation

    StabL Base platform or Serta Motion adjustable bed

  • Special Features

    Memory foam infused with both cooling and support gels

  • Sleep Trial

    not stated

  • Bed Warranty

    25-year limited warranty

  • Manufactured In


  • Restrictions

    Keep in sanitary condition, and provide proper foundation

  • Website


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