Serta iComfort Blue 300 CT Firm Mattress Review

Serta iComfort Blue 300 CT Firm lifestyle - mattress in a room

The Blue 300 CT Firm is a firm feeling iComfort mattress. It's a bit firmer than its sister model, the Blue 300 CT Plush. Our team tested each and every Serta iComfort model at our facility and you can see the results and our review for the Blue 300 CT Firm below:

Comfort Scale Rating

The Blue 300 CT Firm mattress is a firm feeling bed that we rate 3 on our 10 point Comfort Scale (a 1 is hard, 10 is softest). This rating will appeal to those who lean towards a firm feel. Those who like something softer should look at other models.

iComfort Blue 300 CT Firm Expert Video Review

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

Pros & Cons

PROS CONS
  • Tested excellently with proper support and contouring
  • Minimal motion transfer
  • Premium materials
  • Very popular and trusted brand
  • All-foam may not appeal to those who like a traditional springy feel
  • May take a few weeks to fully break-in
  • May take a few days for foam smell to go away
  • May be too firm for some people

Pressure Test Results

We brought the Blue 300 CT Firm mattress into our building and pressure tested it with small, average and large body size people on their sides and back sleeping positions. We do this to give you an idea of what kind of support and comfort you can expect. (Learn how we test.)

The Blue 300 CT Firm mattress had good results for all body sizes and sleeping positions. It provided decent support and there are no spots of excessive pressure. The conforming foams used really help to distribute weight evenly, which is what gets these good results.

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

The Blue 300 CT Firm Features in Detail

serta Blue 300 CT cutaway
  1. 1. TempActive Touch Cover

    This cover feels cool when you touch it, and it helps keep you cool throughout the night, so you can sleep more deeply.

  2. 2. Deep Reaction Max Memory Foam

    A memory foam with a more substantial feel, for better contouring support.

  3. 3. EverCool Fuze Gel Memory Foam

    Breathable memory foam with added gel gives you a softer conforming comfort layer. The gel makes it very contouring.

Comfort Depth Video

We measured how far your hips and shoulders sink into the Blue 300 CT Firm mattress with different body types.

Andrew's Comfort View

Aaron's Comfort View

Richard's Comfort View

Warranty

The Blue 300 CT Firm mattress comes with a 10-year warranty against factory defects.

Conclusion

The iComfort Blue 300 CT Firm is a firm bed. It's not super hard though, so it'll still work for a good number of people. And it had great test results. For all sleeping styles and body sizes, it provided appropriate support and excellent pressure relief. These are the two things necessary for a good night of sleep. Pressure relief to prevent you from tossing and turning, support so you don't wake up with a sore back. All sleep combinations received a 'Recommended' rating except the large-sized side sleeper, which still received a 'Good' rating. These results are remarkable for a firm mattress, as it's common for them to lack pressure relief.

I would recommend this bed to anyone looking for a mid-priced firm mattress. It has great conforming abilities and is quite supportive, due to the high-quality materials used.

See the bed

Serta iComfort Blue 300 CT Firm Mattress Specifications:

Product Name
Queen Price

$1,499

Brand
Serta
Mattress Comfort Firm
Comfort Scale Number 3
Height
11"
Warranty
Back Support System
  • Serta Foam Core
Comfort Padding Layers
Quilt Top of Mattress
  • TempActive Touch Cover
Edge Support

About The Author Joe Nashif

A jack of all trades in the mattress industry, Joe is a merchandiser who’s seen the changes in the products and trends for many years. Active in Brazilian Jui Jitsu, along with related injuries, he enjoys resting at home with family, too.