Serta iComfort CF4000 Firm Mattress Review

Updated January 25, 2022

Couple sitting on a Serta iComfort CF4000 Hybrid Firm Mattress

The iComfort CF4000 Hybrid Firm mattress is the top-of-the-line firm model in the newest iComfort collection from Serta.

Comfort Scale Rating

The CF4000 Hybrid Firm mattress is expected to be a medium-firm comfort rated a 3 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, without it being too hard. If you don't like firm, try the plush option.  

iComfort CF4000 Hybrid Firm Expert Video Review

Here’s our quick Video Review. It highlights the features, benefits, and our impression.

COMING SOON!

Pros & Cons

PROS CONS
  • The Hybrid Support System will minimize motion transfer between you and your sleep partner 
  • Medium-Firm comfort offers a great amount of firmness balanced with pressure relief
  • Premium materials including Air Support™ Foam 
  • Serta is a very popular Trusted Brand, in business since 1931 
  • On the more expensive end of iComfort mattresses

View Bed

Pressure Test Results

We'll pressure test the iComfort CF4000 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.)  

Our expectations for this mattress are that it will perform very well for back sleepers but not so well for side sleepers.  People who sleep on their sides often experience an excess of pressure on their shoulders and hips while laying on a firmer feeling mattress.  

Until we've completed our testing of the CF4000 Hybrid Firm you can use the sample image below as an idea of what a firmer mattress with memory foam like this will perform.  Come back soon for updated information!

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

Details of the Layers Within the iComfort CF4000 Hybrid Firm

CF4000 Hybrid 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. Air Support™ Foam

    This exclusive air-cushion technology moves with your body and smartly contours around it to help alleviate aches and pains caused by pressure points.

  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 Hybrid Firm mattress comes with a 10-year warranty against factory defects.

Conclusion

The CF4000 Hybrid Firm is one of two CF4000's at the top-end of the iComfort Hybrid collection.  While it's firmer than the CF4000 Hybrid Plush it's not overly hard. The three snowflakes stitched into the cover at the foot of the bed show you that this mattress has many layers of cooling materials. Try the plush option if a firm mattress does not work for you.

 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 plush 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, priced around $2,700 for a Queen size, 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 is as large as $1,000!

Buy Now

Serta iComfort CF4000 Hybrid Firm Specifications:

Product Name
Queen Price

$2,699

Brand
Serta
Mattress Comfort
Hybrid Medium-Firm
Comfort Scale Number
5
Coil Count
900
Coil Gauge
15.5
Height
14"
Comfort Padding Layers
Warranty
  • 10-year warranty against manufacturer's defects
  • No Flip, No Rotate
  • Non-prorated
Back Support System
  • Serta Balanced Support Foam
  • 1025 iComfort Hybrid Support™ System
Quilt Top of Mattress
  • Max Cold™ Cover
  • UltraCold System™
Edge Support
  • BestEdge® Foam Encasement
Recommended For Side Sleepers Who Weigh
  • coming soon
Recommended For Back Sleepers Who Weigh
  • coming soon

About the Author, Dave Higgins

Dave has worked in the furniture business, focusing on mattresses, for over six years.  He enjoys oil painting in the Impressionist style, playing guitar, and cooking for his family.  Dave also believes that English Bulldogs are the comedians of the canine world.