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4.6 | 1353 Reviews

Perfect Sleeper Cobalt Calm 13.25" Plush Mattress -Twin XL

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: 38"
  • Height: 13.25"
  • 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
  • Cradles you in cushiony softness; Ideal for side sleepers
  • 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 747935948563
Computed Mattress Size Twin XL
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 Quilt Loft Foam
Layer 2 Thickness (in) 1
Layer 3 Material PillowSoft Aire
Layer 3 Thickness (in) 1
Layer 4 Material Cool Twist Gel Memory Foam
Layer 4 Thickness (in) 1
Layer 5 Material Cool Twist Gel Foam
Layer 5 Thickness (in) 1
Layer 6 Material 850 3 Zoned Coil System
Layer 6 Thickness (in) 8
Layer 7 Material Balanced Support Pad
Layer 7 Thickness (in) 1
Product Depth (in) 79.5
Product Height (in) 13.25
Product Width (in) 38
Shipping Depth (in) 80
Shipping Height (in) 13.25
Shipping Width (in) 40
Product Weight (lb) 47.87,
Shipping Weight (lb) 49
Edge Support Technology Name Best Edge® Foam Encasement
Antimicrobial? Yes
Breathable Construction? Yes
Coil Count 372
Coil Density 539
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 Plush
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 24.84
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: 38"
  • Height: 13.25"
  • 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.

4 Stars

Mattress feedback

Patrick S 5/9/2025

It's a bit firmer than I thought when I tested it out at the store Macy's, but I will get used to it
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Great purchase!

Valentina B 5/6/2025

Very comfortable and support, we love it.
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Best Night

Amy C 5/6/2025

Last night was the best sleep and woke with no body aches. Here's to more nights.
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Mattress

Clarence J 5/4/2025

Comfortable mattress and enjoying needed sleep.
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Mattress

Faithlyn G 5/4/2025

Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Comfy

Lisa D 5/4/2025

Very comfortable and relaxed sleeping
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Mattress and bed frame

Jerry M 5/3/2025

looks nice my Twin XL mattress and bed frame.
Originally posted on www.serta.com

Yes, I recommend this product

4 Stars

First king size bed!

Darby N 5/3/2025

Love my new Serta mattress!
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

from mattress in a bag to Serta

Sean S 5/3/2025

We had a nectar mattress for the past 10 years, it was nice but wanted to support of an inner structure with the comfort of a memory foam. This was the best of both worlds getting the Serta hybrid. The Med firm with pillow top is perfect. I get great sleep, I am a side sleeper, wife is a back sleeper. Both are extremely comfortable.
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Mr T's perfect mattress

Fernando T 5/2/2025

Medium firm and comfy for this old bag of bones of mine. Perfect.
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Sooo goood

Carrie Z 5/1/2025

Slept like a baby. I like the softness. My husband liked the firmness. Same mattress different opinions. So good.
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

thank you!

Eunjung W 4/30/2025

good for low back. so i can have deep sleep.
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Great night sleep

Cristina M 4/30/2025

Very restful night sleep!! I am comfortable and my body feels so much better in a great mattress!
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Comfy

Abraham P 4/30/2025

So comfortable we bought two!
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Fabulous!

Laura H 4/30/2025

Fantastic mattress!!
Originally posted on www.serta.com

Yes, I recommend this product

3 Stars

Need more coil

Oscar D 4/28/2025

Need more coil compare with the competition
Originally posted on www.serta.com

No, I do not recommend this product

5 Stars

Very comfy!

Robert W 4/27/2025

As soon as the mattress was delivered I flopped down on it! If was very comfortable and I didn't want to get up! I'm ready for night time.
Originally posted on www.serta.com

Yes, I recommend this product

4 Stars

Comfortable

Mark J 4/27/2025

Comfortable,steady great quality
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Awesome

Joshua M 4/26/2025

Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

The Best

Wendy S 4/26/2025

I love my new mattress
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Serta Perfect Sleeper Med firm

Manon S 4/25/2025

Mattress is medium firm support over which I placed a duck feathered topper. It is very comfortable.
Originally posted on www.serta.com

Yes, I recommend this product

3 Stars

Nice

Monica L 4/25/2025

Not soft material
Originally posted on www.serta.com

No, I do not recommend this product

5 Stars

Finaly

Jessica R 4/25/2025

Supportive, comfy, do not sink down and disappear into the abyss of memory foam. We are very happy with our purchase and look forward to more time on it. 🙃
Originally posted on www.serta.com

Yes, I recommend this product

4 Stars

I love the firmness

Kathleen P 4/25/2025

I've been needing a firm mattress due to arthritis in back.
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Comfy Bed

Juliet S 4/25/2025

Very great comfy mattress
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Candies New Mattress

Candice H 4/24/2025

Great for side sleepers. Supportive, comfortable and restful.
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Great night sleep

Dorothey C 4/24/2025

Very supportive and is a great night rest.
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Comfy

Tricia D 4/22/2025

Much better sleep!
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Perfect mattress

Miranda B 4/21/2025

This mattress is perfect for my room! Super comfy and fluffy.
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

100% satisfied

Nina P 4/20/2025

I tried a foam mattress and it didn't give me the support I needed. With Perfect Sleep, I resolved the issue and returned the foam mattress.
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Very comfortable and supportive. Would highly recommend

Tracy L 4/19/2025

Very comfortable and supportive. Would highly recommend
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Awesome

Asnley S 4/18/2025

Happy with my purchase!
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Comfy

Julia S 4/18/2025

Comfortable sleep, maybe adjust your sheet blanket ratio but other than that have had good sleep the last few nights
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Comfortable

Anita H 4/16/2025

It's really comfortable
Originally posted on www.serta.com

Yes, I recommend this product

1 Stars

Disappointed

Casey S 4/13/2025

That broke down within a few months of having
Originally posted on www.serta.com

No, I do not recommend this product

5 Stars

Sleep so good.

Rossia L 4/13/2025

I am very comfortable and relaxed with this mattress.
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Great mattress

Rickie H 4/11/2025

Comfortable, supportive, good quality mattress. I have slept on a certain mattress for over 30 years. Good quality, that lasts forever. And who doesn't want a good night sleep?
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Fantastic!

David C 4/11/2025

The perfect mattress- not too firm and not too soft
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Fantastic

4/11/2025

Very comfy and glad to have it
Originally posted on www.serta.com

Yes, I recommend this product

4 Stars

Mattress Review

Janet C 4/11/2025

Good firm mattress but would have preferred a flat surface lile my past Serta Perfect Sleeper
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Great support

Nkcody 4/8/2025

I love this mattress! Great support unlike the memory foam toppers, and mattresses I have tried. Worth the investment to get this traditional spring mattress. As an older person I have found it easier to move about and the edges are very firm for sitting. Highly recommend!
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Super firm mattress

Donna B 4/8/2025

Extra firm, and a great nights sleep. Easier for me to get on and off!
Originally posted on www.serta.com

Yes, I recommend this product

1 Stars

Comfy

Yadira C 4/8/2025

Very comfy mattress
Originally posted on www.serta.com

No, I do not recommend this product

4 Stars

Looks good

William D 4/7/2025

Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Happy

Tammy J 4/7/2025

Very comfortable
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Twin XL x 2

Myna S 4/7/2025

Both of us enjoy the new mattresses
Originally posted on www.serta.com

Yes, I recommend this product

4 Stars

good mattess

Laura E 4/5/2025

Very comfortable.
Originally posted on www.serta.com

Yes, I recommend this product

1 Stars

Hurts Back

McCarty 4/3/2025

Will be returning for refund. Hurts wife's back and is sagging in the first 30 days.
Originally posted on www.serta.com

No, I do not recommend this product

5 Stars

Love this comfy mattress

Mary V 4/1/2025

Pillow top is so comfortable!
Originally posted on www.serta.com

Yes, I recommend this product

5 Stars

Great Experience - Perfect Sleep

Ioannis T 3/30/2025

Purchased the I-Series 2000 and revolutionized my body structure! From months of back pain, finally feel normal again.
Originally posted on www.serta.com

Yes, I recommend this product