Serta iComfort CF4000 Quilted Hybrid Extra Firm Mattress Review

Updated January 13, 2023

The iComfort CF4000 Quilted Hybrid Firm mattress is the top-of-the-line firm model in the newest iComfort collection from Serta.  For a model that's called a 'firm', this mattress actually feels more in the middle of our 10-point comfort scale at a 4 rating. It exhibited excellent pressure relief and body contouring during our pressure testing. For more information about this bed please read on:

Comfort Scale Rating

The CF4000 Quilted Hybrid Firm mattress is expected to be a very firm comfort that we'll probably rate a 2 on our 10 point Comfort Scale (a 1 is hard, 10 is softest.)  A mattress with this comfort will work nicely for people who like a firmer feel, or something in the middle between soft and firm. 

Pros & Cons

PROS	CONS
The Hybrid Support System will minimize motion transfer between you and your sleep partner, also assisted by the memory foam on top  Will keep you cool all night with three levels of cooling technology Premium materials including Air Support™ Foam, for good pressure relief and support Serta is a very popular and trusted brand, with many customer reviews, in business since 1931	Extra-firm comfort will only appeal to those who prefer a harder sleeping surface Memory foam can emit an odor that can take a few days to a week to dissipate

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Pressure Test Results

We've pressure tested the iComfort CF4000 Quilted Hybrid Firm mattress with small, average, and large body size people on their sides and on their back sleeping positions to see what kind of support and pressure relief you can expect. (Learn how we test.)  

The mattress performed pretty decent overall, with only one score of 'not recommended', for larger back sleepers. Side sleepers may feel a bit of extra pressure in their shoulders or hips, but if you love a firm feel, it's still a good mattress for you. This mattress works best for back sleepers of an average size.

As you consider the CF4000 Firm for your next new mattress please feel free to consider our pressure mapping technology in your considerations:

Layers of the iComfort CF4000 Quilted Hybrid Extra Firm

1. 1. 1025 iComfort Hybrid Support™ System

   In this advanced innerspring system, individually wrapped coils work independently to conform to every curve of your body and provide durable support.

2. 2. Carbon Fiber Memory Foam

   Carbon fiber does the heavy lifting here, adding cooling qualities, durability, and support to this memory foam.

3. 3. Serta Balanced Support Foam

   This layer of foam cradles your body which enhances that 'hug-like' feeling you get from memory foam and provides supportive comfort. 

4. 4. Max Cold™ Cover

   This cool-to-the-touch cover helps reduce your body temperature for ideal sleeping comfort. It helps you to fall asleep faster and stay asleep longer.

Warranty

The iComfort CF4000 Quilted Hybrid Extra Firm mattress comes with a 10-year warranty against factory defects.

Other Comfort Options

If you like the Serta Comfort CF4000 Quilted collection, but would rather have it in a different comfort level, check out the other options below.

• iComfort CF4000 Quilted Hybrid Plush Review
• iComfort CF4000 Quilted Hybrid Plush Pillow Top Review
• iComfort CF4000 Quilted Hybrid Medium Pillow Top Review

Serta iComfort CF4000 Quilted Hybrid Extra Firm Specifications:

Product Name	iComfort CF4000 Quilted Hybrid Firm
Price	Check Price
Brand	Serta
Mattress Comfort	Medium
Comfort Scale Number	2
Coil Count	900
Coil Gauge	15.5
Height	14.75"
Comfort Padding Layers	Ultra Cold System 1" Carbon Fiber Memory Foam 3" Air Support Foam
Warranty	10-year warranty against manufacturer's defects No Flip, No Rotate Non-prorated
Back Support System	1025 iComfort Hybrid Support™ System
Quilt Top of Mattress	Max Cold™ Cover
Edge Support	BestEdge® Foam Encasement
Recommended For Side Sleepers Who Weigh	210-273 lbs 134-218 lbs 111-135 lbs
Recommended For Back Sleepers Who Weigh	134-218 lbs 111-135 lbs

About the Author, Dave Higgins, Mattress Expert

Dave has worked in the furniture business, focusing on mattresses, for several years. His focus on mattress industry trends and developments has led to a deeper understanding of how people sleep and how they perceive comfort.