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 910.246.2233 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.

Partnered with
4.6 | 1283 Reviews

Perfect Sleeper Cobalt Calm 14.5" Firm Pillow Top Mattress -California King

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: Pillow Top
  • Width: 72"
  • Height: 14.5"
  • Depth: 83.5"

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
  • Firm and supportive with a pillowy, cloud-like top layer
  • 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 747935947061
Computed Mattress Size Cal King
Country of Manufacture USA
Assembled in USA? Yes
Computed Product Type One Sided Mattress
Product Category Mattress
Family Name ,
SubFamily Name Cobalt Calm
Mattress Top Type Pillow 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 PillowSoft Aire
Layer 2 Thickness (in) 1
Layer 3 Material Support Foam
Layer 3 Thickness (in) 0.5
Layer 4 Material Cushion Quilt Foam
Layer 4 Thickness (in) 2
Layer 5 Material Cool Twist Gel memory Foam
Layer 5 Thickness (in) 1
Layer 6 Material Support Foam
Layer 6 Thickness (in) 1
Layer 7 Material 850 3 Zoned Coil System
Layer 7 Thickness (in) 8
Layer 8 Material Balanced Support Pad
Layer 8 Thickness (in) 1
Product Depth (in) 83.5
Product Height (in) 14.5
Product Width (in) 72
Shipping Depth (in) 84
Shipping Height (in) 14.5
Shipping Width (in) 73
Product Weight (lb) 109.27,
Shipping Weight (lb) 110
Edge Support Technology Name Best Edge® Foam Encasement
Antimicrobial? Yes
Breathable Construction? Yes
Coil Count 918
Coil Density 1160
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 Firm
Mattress Cover Design Floral
Mattress Cover Stitch Design Floral
Memory Foam? Yes
Moisture-Wicking? Yes
Natural Fibers? No
Pillow Top? Yes
Product Accent Color Light Blue
Product Cubes 52.07
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: Pillow Top

  • Dimensions

  • Width: 72"
  • Height: 14.5"
  • Depth: 83.5"

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

4.6 out of 5

91% of reviewers recommend this product.

5 Stars

Nice and Firm!!

Diane w H 3/20/2025

I love the firmness and thickness of this mattress. I am very pleased with this mattress.
Originally posted on www.serta.com

Yes, I recommend this product

3 Stars

much firmer than the store model

Mary M 3/20/2025

lots of support, way firmer than the store model. we both don't really like the firmness after a week sleeping on it
Originally posted on www.serta.com

No, I do not recommend this product

5 Stars

Perfect mattress finally we found this

Jim P 3/19/2025

Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Love!

Monica V 3/18/2025

Perfect, I'm sleeping on cloud of marshmallows!!
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Setra Ultimate 14.5" Queen

James C 3/18/2025

Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Impressed

Lisa V 3/18/2025

What a difference!
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Nice Bed

Vicki L 3/17/2025

nice and comfortable mattress
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Comfortable

Lori S 3/16/2025

Amazing mattress, comfortable and plush
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Great

Paulette M 3/15/2025

Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Comfort

Charles S 3/14/2025

Mattress is firm but comfortable with pillow top. Excited for a good nights sleep 🙂
Originally posted on www.serta.com

Yes, I recommend this product

4 Stars

Finally some good sleep at the beach!

Laura K 3/14/2025

Thank you! Wonderful mattress!
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Serra experience

Vinson B 3/13/2025

Super comfy and the movers were super fast
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Great!

Tim E 3/12/2025

Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Perfect for me.

Dario P 3/12/2025

The most comfortable mattress I've had in years. Firm with a pillow top.
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Plush and firm

Joseph R 3/11/2025

Nice height
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Very comfortable and a great price

Zoe B 3/11/2025

This mattress is extremely comfortable! I can't believe the great price I paid
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Great sleep

Irene J 3/11/2025

Very comfortable. Restful sleep,
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Blue Luxury

Karen S 3/10/2025

Extremely comfy amd luxurious!
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Happy

Neeka D 3/9/2025

I can finally sleep comfortably again!!!
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Excellent

Melanie W 3/8/2025

I am so in love with my mattress
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Sleep with spine arthritis

Sally B 3/8/2025

It's great. Holds my spine firmly while laying down.
Originally posted on www.serta.com

Yes, I recommend this product

4 Stars

Comfortable

Robert S 3/7/2025

Originally posted on www.serta.com

Yes, I recommend this product

4 Stars

Comfortable

Robert S 3/7/2025

Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Sleep

Randy S 3/6/2025

Very comfortable.
Originally posted on www.serta.com

Yes, I recommend this product

4 Stars

COMFORT

Jeff F 3/6/2025

VERY COMFORTIBLE
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Love this new mattress!

Mary M 3/6/2025

This mattress is so comfortable! And they hauled our old one off! Very happy!
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

2025 Serta PSL23 MATTRESS

Lillian C 3/4/2025

Supportive mattress
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Comfortable

Jose B 3/4/2025

Comfortable mattress, wake up feeling well rested.
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Blue Lagoon Nights!

Barbara S 3/3/2025

Great sleep from the very first night!
Originally posted on www.serta.com

Yes, I recommend this product

3 Stars

Blue Lagoon

Melissa K 2/28/2025

Originally posted on www.serta.com

No, I do not recommend this product

1 Stars

Not a great mattress!!

Vickie P 2/28/2025

We have had ours less than a month and it has humps in it already, very uncomfortable!!
Originally posted on www.serta.com

No, I do not recommend this product

5 Stars

Blue Lagoon

Lissa R 2/27/2025

Very soft yet good support
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Firm but plush

Judy S 2/27/2025

The mattress is very comfortable. It seems a little firm, but the plush pillow top helps it to be more comfortable. So far I am satisfied with the mattress.
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

LOVE THE FEELING

Lillian B 2/26/2025

My body feels like this is not the same body that I had before sleeping on this new mattress. I don't wake up with the stiffness that I had previously. What a difference I feel in my whole body, it was worth every penny.
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Sleeping like a baby!

Emonte B 2/25/2025

This is the best mattress I have ever owned! Whether I take a 2 hour cat nap or I get 6-8hrs of rest it feels like 20 hours have gone by. The detail in the design is nice and the firmness holds up, it's my favorite thing in my bedroom. First time owner of a Serta but certainly I have become a lifetime customer!
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Comfy and supportive mattress

Enrique C 2/25/2025

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

Yes, I recommend this product

2 Stars

Not what we expected

Kelly O 2/22/2025

The top of the bed forms divots or indentations and it is difficult for us to move or roll over during the night. The foam on top also feels extremely hot.
Originally posted on www.serta.com

No, I do not recommend this product

5 Stars

Very light

Kathleen L 2/22/2025

Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

My Serta Perfect Sleeper

Marilyn M 2/22/2025

The mattress is very comfortable and gives great support⁰
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Great Bed

Christopher F 2/22/2025

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

Yes, I recommend this product

1 Stars

Failure to Deliver Mattress Bundle

Dave A 2/21/2025

I purchased a queen size Serta mattress and adjustable base with the understanding I would also receive a queen sized "Mattress Bundle" which did not arrive. I'm very disappointed about not having received the "Mattress Bundle" and am still deciding whether to keep the Serta mattress and adjustable base.
Originally posted on www.serta.com

No, I do not recommend this product

2 Stars

Already getting divits

Melissa L 2/21/2025

I love the mattress when I originally got it, but after sleeping in it with my partner, it has already started getting divots in it and we must rotate it regularly. I'm going to actually try to upgrade back to.
Originally posted on www.serta.com

No, I do not recommend this product

5 Stars

Not too firm, Not too soft, but JUST RIGHT

Theda D 2/20/2025

Slept great the first night!
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

The perfect firmness and still a soft night's sleep.

Tyler D 2/20/2025

The bed is nice and firm, supportive on all sides and edges. Feels great getting into and still get that nice soft sleep when rolling over or on your side. Highly recommend
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

New Mattress

Vernon B 2/19/2025

The mattress is very firm and comfortable.
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Adoring Plush Night Sleep

Gloria D 2/17/2025

This is probably one of the most plushes mattresses I've ever owned by Serta and probably my first, but it sleeps extremely comfortable and restful, would highly recommend in the setup by the delivery team. Was top-notch, thanks.
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Bought for my grand daughter's bedroom

Donna M 2/17/2025

Very satisfied with the mattress
Originally posted on www.serta.com

Yes, I recommend this product

4 Stars

Pretty good

Ryan M 2/17/2025

It's comfy but a little stiff . With a mattress topper its perfect.
Originally posted on www.serta.com

Yes, I recommend this product

2 Stars

Not What I expected

Frank M 2/17/2025

The mattress was comfy for about a month or two, then it seemed to quickly have sagging areas along the side (sitting on side of bed) and in the middle. We sought a new mattress due to pressure points experienced with out Temperpedic mattress. We were assured that that would not be an issue with this new Serta mattress. Well. I am now regretting that decision.
Originally posted on www.serta.com

No, I do not recommend this product

5 Stars

Good quality

Kathleen P 2/16/2025

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

Yes, I recommend this product