Serta iComfort CF4000 Quilted Hybrid Extra Firm Mattress Review

Updated January 13, 2023

Serta iComfort CF4000 Quilted Hybrid Firm Mattress

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

View Details


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:


BACK SLEEPER SIDE SLEEPER
LARGE PEOPLE Largest 10% of adults 210-273 lbs Large back sleeper heatmap Avg Pressure: mmHg - Area: inches2 Large side sleeper heatmap Avg Pressure: mmHg - Area: inches2
AVERAGE PEOPLE Middle 50% of adults 134-218 lbs Average back sleeper heatmap Avg Pressure: mmHg - Area: inches2 Average side sleeper heatmap Avg Pressure: mmHg - Area: inches2
PETITE PEOPLE Smallest 10% of adults 111-135 lbs Petite back sleeper heatmap Avg Pressure: mmHg - Area: inches2 Petite side sleeper heatmap Avg Pressure: mmHg - Area: inches2
BACK SLEEPER
LARGE PEOPLE Largest 10% of adults 210-273 lbs Large back sleeper heatmap Avg Pressure: mmHg - Area: inches2
AVERAGE PEOPLE Middle 50% of adults 134-218 lbs Average back sleeper heatmap Avg Pressure: mmHg - Area: inches2
PETITE PEOPLE Smallest 10% of adults 111-135 lbs Petite back sleeper heatmap Avg Pressure: mmHg - Area: inches2
SIDE SLEEPER
LARGE PEOPLE Largest 10% of adults 210-273 lbs Large side sleeper heatmap Avg Pressure: mmHg - Area: inches2
AVERAGE PEOPLE Middle 50% of adults 134-218 lbs Average side sleeper heatmap Avg Pressure: mmHg - Area: inches2
PETITE PEOPLE Smallest 10% of adults 111-135 lbs Petite side sleeper heatmap Avg Pressure: mmHg - Area: inches2

Layers of the iComfort CF4000 Quilted Hybrid Extra Firm

CF4000 Firm Cutaway Image
  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.

CF4000 Firm on an Adjustable Base

Warranty

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

Conclusion

The CF4000 Quilted Hybrid Extra Firm is one of the CF4000s at the top end of the iComfort Quilted Hybrid collection. It's the firmest of the three CF4000s in the Quilted Hybrid collection, and it does have a very solid feel. The three snowflakes stitched into the cover at the foot of the bed show you that this mattress has many layers of cooling materials.

 A layer of Carbon Fiber Memory Foam paired with the UltraCold System™ channels heat away from your body. More comfort is derived from the Deep Reaction™ Max Memory Foam. Serta's exclusive Air Support™ Foam contours to your body and helps relieve aches and pain caused by pressure points. This premium firm mattress is one of the coolest sleeping iComfort models ever.

I don't make ridiculous money writing mattress reviews, I live paycheck to paycheck just like nearly everyone. I think that this bed is a pretty expensive buy. That said, for anyone who wants a medium-firm comfort bed with all the trimmings, then this is one of the best mattresses you could get. If you still want one of these iComfort Hybrid models but can't afford the steep tab, check into one of the other models, the price swing can be as large as $1,000! You'll mostly be sacrificing cooling with the lower-end models, they have the same comfort materials, though maybe not as much.


Buy Now


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.

Serta iComfort CF4000 Quilted Hybrid Extra Firm Specifications:

Product Name
iComfort CF4000 Quilted Hybrid Firm
Price
Brand
Serta
Mattress Comfort
Medium
Comfort Scale Number
2
Coil Count
900
Coil Gauge
15.5
Height
14.75"
Comfort Padding Layers
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 Higgins, Mattress ExpertDave 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.