Skip disability assistance statement.

Welcome to our website! As we have the ability to list over one million items on our website (our selection changes all of the time), it is not feasible for a company our size to record and playback the descriptions on every item on our website. However, if you have a disability we are here to help you. Please call our disability services phone line at 636-583-3133 during regular business hours and one of our kind and friendly personal shoppers will help you navigate through our website, help conduct advanced searches, help you choose the item you are looking for with the specifications you are seeking, read you the specifications of any item and consult with you about the products themselves. There is no charge for the help of this personal shopper for anyone with a disability. Finally, your personal shopper will explain our Privacy Policy and Terms of Service, and help you place an order if you so desire.

4.6 | 1440 Reviews

Perfect Sleeper Cobalt Calm 12" Extra Firm Mattress -Queen

Perfect Sleeper

Features

  • Cool Twist® Gel Foam - Cooling gel is swirled directly into a breathable foam designed to promote airflow and heat dissipation.
  • Cool Twist® Gel Memory Foam This unique design features cooling gel swirled into premium memory foam. This breathable memory foam helps enhance airflow and heat dissipation for a feeling that can only be described as a cool, contouring type of comfort.
  • PillowSoft® Aire Soft foam provides enhanced cushioning for exceptional comfort and promotes airflow through its unique, gently rippling design.
  • 3 Zoned Coil Design - This 850-coil density system offers three support zones with targeted support for your lower back and hips and cradled comfort everywhere else.

Quick Specs

  • Brand: SERTA
  • Line: Perfect Sleeper
  • Type: Tight Top
  • Width: 60"
  • Height: 12"
  • Depth: 79.5"

See More

 
Featuring a 3 zoned coil design, this mattress offers pressure relief and support where you need it, with a Cool Twist® Gel Memory Foam that contours to your body-with upgrades available with more cooling layers and support.

Features

  • Cool Twist® Gel Foam - Cooling gel is swirled directly into a breathable foam designed to promote airflow and heat dissipation.
  • Cool Twist® Gel Memory Foam This unique design features cooling gel swirled into premium memory foam. This breathable memory foam helps enhance airflow and heat dissipation for a feeling that can only be described as a cool, contouring type of comfort.
  • PillowSoft® Aire Soft foam provides enhanced cushioning for exceptional comfort and promotes airflow through its unique, gently rippling design.
  • 3 Zoned Coil Design - This 850-coil density system offers three support zones with targeted support for your lower back and hips and cradled comfort everywhere else.
  • Anti-Microbial Technology - Our anti-microbial mattress technology will keep your mattress fresh and clean from odor-causing bacteria.
  • CertiPUR
  • Designed and Built in USA
  • Adjustable Base Compatible
  • 10 Year Warranty
  • Your new mattress may initially feel firmer than expected. Please allow up to 60 days to acclimate to your new mattress as it naturally adjusts to contour, comfort, and support you best
  • Gives the sensation of lying on top of the mattress with little give
  • Premium memory foam is temperature-sensitive; it may feel firmer in cooler temperatures and softer in warmer ones. For your preferred comfort, please allow several hours for your memory foam mattress to adjust to the room's temperature
Brand Serta
Manufacturer Name Serta Simmons Bedding LLC
UPC 747935948495
Computed Mattress Size Queen
Country of Manufacture USA
Assembled in USA? Yes
Computed Product Type One Sided Mattress
Product Category Mattress
Family Name Perfect Sleeper
SubFamily Name Cobalt Calm
Mattress Top Type Tight Top
Mattress Type Innerspring
Product Type Mattress
Year of Launch 2023
Dealer Line National Line
Layer 1 Material PerfectPure Fiber
Layer 1 Thickness (in) 1
Layer 2 Material Support Foam
Layer 2 Thickness (in) 0.5
Layer 3 Material Support Foam
Layer 3 Thickness (in) 0.5
Layer 4 Material Cool Twist Gel Memory Foam
Layer 4 Thickness (in) 1
Layer 5 Material Serta Support Foam
Layer 5 Thickness (in) 1
Layer 6 Material 850 3 Zoned Coil Support
Layer 6 Thickness (in) 8
Layer 7 Material Balanced Support Pad
Layer 7 Thickness (in) 1
Product Depth (in) 79.5
Product Height (in) 12
Product Width (in) 60
Shipping Depth (in) 80
Shipping Height (in) 12
Shipping Width (in) 61
Product Weight (lb) 73.84,
Shipping Weight (lb) 75
Edge Support Technology Name Best Edge® Foam Encasement
Antimicrobial? Yes
Breathable Construction? Yes
Coil Count 651
Coil Density 850
Coil Type Pocketed Coil
Coil Gauge 14.75
Cooling Technology? Phase change material
Edge Support? Yes
Foam Infusion? None
Handles Included? Yes
Hypoallergenic? No
Is Mattress 2 Sided? No
Latex Free? No
Low Motion Transfer? Yes
Lumbar Support Yes
Mattress Comfort Level Extra Firm
Mattress Cover Design Floral
Mattress Cover Stitch Design Floral
Memory Foam? Yes
Moisture-Wicking? Yes
Natural Fibers? No
Pillow Top? No
Product Accent Color Light Blue
Product Cubes 34.31
Quilted Cover? Yes
Reinforced Center? Yes
Side Color Dark Blue
Top Cover Color Dark Blue
Zipper Cover Machine Washable? No
Zipper Cover? No
Product Warranty Length 10

Quick Specs


  • Manufacturer

  • Brand: SERTA
  • Line: Perfect Sleeper

  • Appearance

  • Type: Tight Top

  • Dimensions

  • Width: 60"
  • Height: 12"
  • Depth: 79.5"

Professional delivery and installation is available for every product we sell. We would be happy to coordinate delivery and installation for you.

Extended warranties are usually very inexpensive and can save you thousands in the future. It's simple and inexpensive to purchase extended warranties and one of the smartest ways to protect your investment.

Mattresses can be large, heavy and expensive. You probably don't have the special tools or expertise needed to fix them in a crisis. If you can spare a few thousand dollars without batting an eyelash for new bedding should they break tomorrow, don't buy a warranty. But if you're like most of us, protect yourself by purchasing inexpensive extended warranties when you buy a new product and save yourself big money in the long run.

4.6 out of 5

91% of reviewers recommend this product.

5 Stars

New bed

Michael B 7/28/2025

Cindy perfect great bed
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Serta

Ana L 7/24/2025

Great sleep experience
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Comfortable Amazing back support!

Melissa L 7/22/2025

Best night's sleep I've had in years. No pain or pressure points.
Originally posted on www.serta.com

Yes, I recommend this product

3 Stars

Sagging

Justin A 7/21/2025

We just got it 2 months ago and it's sagging already. ☹️ and our hips and backs are in pain
Originally posted on www.serta.com

No, I do not recommend this product

5 Stars

Cobalt Calm PT

Rachael Z 7/21/2025

Very comfortable!
Originally posted on www.serta.com

Yes, I recommend this product

4 Stars

.

Linda L 7/20/2025

Very comfortable
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

supportive

Rhee H 7/20/2025

this mattress is very comfortable and it is supportive, only 2 weeks in and already sleeping better.
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

NA

Maged G 7/19/2025

Great for restful sleep
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Counting Sheep

Regina G 7/19/2025

Very Comfortable
Originally posted on www.serta.com

Yes, I recommend this product

4 Stars

New Mattress

Noah C 7/18/2025

Comfy, soft, enjoyable, great for sleep!
Originally posted on www.serta.com

Yes, I recommend this product

2 Stars

Saggy on the sides

Washington M 7/18/2025

Started getting saggy on the sides after 3 months of use
Originally posted on www.serta.com

No, I do not recommend this product

5 Stars

Love it! So much better than Purple!

Matthew L 7/17/2025

Don't buy a Purple, although comfy, they fall apart. I used to have a Serta and I wish that I never would have got the Purple. I should've stuck with Serta. The Serta is much more durable and just as comfortable if not a little bit more comfortable, we love it.
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Wonderful bed!

Obadiah C 7/17/2025

Comfortable and spacious! I haven't had back pain since sleeping on the new mattress!
Originally posted on www.serta.com

Yes, I recommend this product

3 Stars

A tad too firm

Eugenia M 7/15/2025

A little too firm.
Originally posted on www.serta.com

No, I do not recommend this product

5 Stars

Excellent

Rafael L 7/15/2025

It feels like a real bed.
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Best mattress of my life so far

Danielle A 7/15/2025

Ive owned a handful of mattresses in my life but I've never slept better until now:)
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

So far, so god

Heather G 7/14/2025

Comfy and supportive
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Aspen firm

David E 7/13/2025

All around nice bed
Originally posted on www.serta.com

Yes, I recommend this product

1 Stars

Very disappointed

Robert W 7/12/2025

After three months the mattress is sagging on the side close to 2 1/2 "causing me to almost fall out of bed twice! At first I really liked this mattress until it started sagging.
Originally posted on www.serta.com

No, I do not recommend this product

3 Stars

Great

Troyann F 7/12/2025

Great size but it's too firm for a pillow top
Originally posted on www.serta.com

No, I do not recommend this product

5 Stars

resting

Barbara M 7/11/2025

very supportive
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Very Comfy And Relaxing!

Waleed I 7/9/2025

This mattress is super comfy and relaxing! Along with keeping your back healthy and feeling great the mattress provides great support for a nights restful sleep, without waking up to severe back pain from an old mattress. This is a great choice for those who want a comfortable, soft, and back supporting mattress that will ensure a great sleep!
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Serta Blue Lagoon

Chanpheng F 7/8/2025

Comfy, supportive, and sleeping on a cloud. It's divine!!! Highly recommend!
Originally posted on www.serta.com

Yes, I recommend this product

3 Stars

Not the best quality

Kathy P 7/8/2025

I am having issues with it. Waking up with my arms and back hurting.
Originally posted on www.serta.com

No, I do not recommend this product

5 Stars

Great mattress

Rachel B 7/8/2025

Very restful and supportive
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Dog approved!

Juan V 7/7/2025

I'm impressed with this super comfy bed... my back thanks you!!! & so does my dog ? Thank you Serta !!!
Originally posted on www.serta.com

Yes, I recommend this product

4 Stars

Good

Robert T 7/6/2025

Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Great sleep

Danny S 7/5/2025

Mattress is great. Slept like a baby on it. Very supportive!
Originally posted on www.serta.com

Yes, I recommend this product

4 Stars

Pretty good

Gerard S 7/4/2025

Comfy, supportive.
Originally posted on www.serta.com

Yes, I recommend this product

4 Stars

Mattress

Dora S 7/4/2025

Comfy & supportive
Originally posted on www.serta.com

Yes, I recommend this product

4 Stars

Firm at first

Leslie H 7/3/2025

First night and it's a little more firm than expected - hoping over time that'll change
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

So comfortable!

Christine B 7/2/2025

Great mattress! Firm, supportive and just what I needed! And price was reasonable.
Originally posted on www.serta.com

Yes, I recommend this product

4 Stars

Firm yet plush

Rachel J 7/1/2025

Comfy pillow top. Could be cooler. That was a selling point for me was cooling aspect of it.
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Mattress

Amy B 7/1/2025

Comfy and supportive mattress.
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Awesome

Elijah G 6/30/2025

Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Sleep !!

Tony B 6/29/2025

No more body aches thankyou serta!!!
Originally posted on www.serta.com

Yes, I recommend this product

4 Stars

Serta New

Ingrid F 6/29/2025

Day three and enjoying it
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Soft and comfy

Amber C 6/28/2025

Plush and comfortable
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

great mattress at great price.

Sohail R 6/27/2025

great mattress at great price.
Originally posted on www.serta.com

Yes, I recommend this product

1 Stars

Do not recommend

Rita R 6/26/2025

After three months the mattress is sagging and it's causing me and my husband back pain.
Originally posted on www.serta.com

No, I do not recommend this product

5 Stars

Serta Cobalt Calm

Susan D 6/26/2025

Feels like I've had it a long time. So comfortable, supportive yet cushiony
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Serta Perfect Sleep

Marcella J 6/23/2025

This mattress lives up to its name. I experience instant comfort, falling asleep faster and less movement, resulting in restful sleep and fresh mornings.
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Beautiful & comfortable

Alma M 6/21/2025

A single product of comfort, providing rest and body support and beauty!
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Amazing sleep!

Joaquin V 6/20/2025

So comfy and well support !
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

happy customer

Mark M 6/19/2025

Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Nicely firm

Robin U 6/18/2025

Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Good

Sandra S 6/13/2025

Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Blue Lagoon matress

Laurie L 6/12/2025

Comfy and supportive. Sleep well on it
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Excellent

Miles P 6/12/2025

Extremely comfortable and a wonderful night's sleep
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Great Mattress

Marino S 6/11/2025

I have bought a new mattress in 30 years and I'm sorry I didn't do it sooner! Very comfortable, new technology, the cool gel and the breathable fabric cover is great!
Originally posted on www.serta.com

Yes, I recommend this product