Serta Perfect Sleeper Cobalt Calm Extra Firm Queen Innerspring 12" Mattress

4.1 (24) Reviews COBALTXF5/0MATT

Competition $1599.99 Sale Price $1099.99 Save $100 $999.99 + Free Same Day Delivery

Pay $42.50/mo. with 24 months special financing

or Buy Now, Pay Later. No ongoing commitment.

Affirm

Size:

King Queen Twin

Free Gift! Your choice of a Power Base, 24" HDTV, $100 GW Rebate or $50 MasterCard

Add to Cart

Serta Perfect Sleeper Cobalt Calm Extra Firm Queen Innerspring 12" Mattress

In stock! Order now for delivery tomorrow to

Sale Price $1099.99 Save $100 $999.99

Add to Cart

Explore Serta Perfect Sleeper Cobalt Calm Extra Firm Innerspring 12" Mattress

Shop Now

Mattress Buying Guide

Serta Perfect Sleeper®

A simple solution for perfect sleep, every night. Featuring a 3- zoned coil design, this mattress offers pressure relief and support where you need it.

In-Stock and Ready for Immediate Delivery

Details

What's Inside

Comfort

Serta® Support Foam

Combines gentle cushoining with extra suppot, for more firmness throughout the mattress.

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.

Support

3-Zoned Coil System

This 850-coil density system offers three support-zones with targeted support for your lower back and hios and cradled comfort everywhere else.

Specifications

Type
Innerspring

Comfort
Ultra Firm

Brand	Serta
Mattress Type	Innerspring
Size	Queen
Height	12.00"
Width	60.00"
Depth	80.00"
Weight	73.80 lbs
Works With Adjustable Base?	Yes
Profile Height	12"
Warranty	10 Years

Products in Collection

View Collection

Serta Perfect Sleeper Cobalt Calm Extra Firm Innerspring 12" Mattress

Also in the Serta Perfect Sleeper Cobalt Calm Extra Firm Innerspring 12" Mattress Mattresses Collection

Serta Perfect Sleeper Cobalt Calm Extra Firm King Innerspring 12" Mattress

More Info

Add to Cart

Save $130

More Info

Add to Cart

Customer Reviews 4.1 (24) Reviews

4.1

24 Reviews, 1 Q&As

4.1

24 Reviews, 1 Q&As

Thank you for posting a review!

We value your input. Share your review so everyone else can enjoy it too.

Thank you for posting a review!

Your review was sent successfully and is now waiting for our staff to publish it.

Thank you for posting a question!

Please click on the link in the confirmation email we just sent you to submit your question.

Your question will appear on the site once someone answers it.

REVIEWS
QUESTIONS

Clear All

Filter Reviews

Quality Mattress Sleep

More Filters

Clear All

24 Reviews

Updating Results

04/27/25

Linda K.

04/10/25

I like it

It’s nice and firm for my back and comfortable at the same time.

Daniel O.

03/11/25

I'm not a big fan

I'm not a big fan of no box springs. A disappointment.

Gardner-White

03/11/25

Hello Daniel! Thank you for sharing your feedback with us. We will take your preference into consideration for future products. We look forward to serving you again soon!

Robert C.

03/01/25

AFTER 3 MONTHS HAD A

AFTER 3 MONTHS HAD A VALLEY IN IT.
MAKES IT DIFFICULT TO ROLLOVER!

Gardner-White

03/03/25

Hello Robert, we're sorry to hear about the valley in your Cobalt Calm mattress from Serta after 3 months. We understand how frustrating that must be. If you haven't already, please reach out to our Next Level Support team at rachelsdesk@gardner-white.com so we can look into this further for you!

Neil K.

03/01/25

It is too firm for

It is too firm for us. We will likely return it.

Gardner-White

03/03/25

Hello Neil, we're sorry to hear that the product was too firm for you. Please feel free to reach out to us for assistance with the return process. Thank you for your feedback.

Marsha J.

02/05/25

It took only a day

It took only a day to get use to my new mattress. It's comfortable and I sleep well.

Ebony H.

10/11/24

Q: Hello, I recently purchased the cobalt calm xfirm mattress and the Yates Grey bed frame. Do I need to have a foundation on this bed and mattress type?

Gardner-White

10/11/24

A: No, you do not need a foundation if you pair this mattress with the Yates.

Need Help Choosing a Mattress?

The mattress experts at Gardner White have your back! Our Mattress Buying Guide can help you cut through all the confusion when you're shopping for a new mattress. Decades of collective experience went into creating the perfect guide for mattress shopping, check it out now!

We've also developed a list of the Best Mattresses of 2025. These include the Best Innerspring Mattress, the Best for Back Pain, and the Best Cooling Mattress among ten other 'Best Of' models. If you're looking for the best of the best in a new mattress, this list is your go-to guide to find youre perfect fit!

Order Total	3 Months	6 Months	12 Months
$75	$25/month	n/a	n/a
$150	$50	$25/month	n/a
$300	$100	$50	$25/month
$900	$300	$150	$75
$1200	$400	$200	$100

Serta Perfect Sleeper Cobalt Calm Extra Firm Queen Innerspring 12" Mattress

Serta Perfect Sleeper Cobalt Calm Extra Firm Queen Innerspring 12" Mattress

Explore Serta Perfect Sleeper Cobalt Calm Extra Firm Innerspring 12" Mattress

Mattress Buying Guide

Description

Serta Perfect Sleeper®

In-Stock and Ready for Immediate Delivery

What's Inside