Experience premium support and perfect sleep with our new Serta® Quilted Perfect Sleeper X™ Collection. Our 5 ZoneResponse™ Design is comprised of Perfect Conform™ Memory Foam paired with 5-zoned coils for full-body alignment. Sleep comfortably cool throughout the night with cooling technology and graphite-infused memory foam designed to redistribute heat away from your body. A quilted top offers a classic feel and added layer of plush foam. Xtraordinary sleep is possible, with Serta® Quilted Perfect Sleeper X™.
Our 5 ZoneResponse™ Design combines coils and contouring memory foam for full body spinal alignment Our PerfectConform™ Memory Foam contours and cradles your pressure points for rejuvenating sleep CoolFeel™ System - Cooling technology keeps you comfortable throughout the night CertiPUR-US® Certified Designed and Built in USA Adjustable Friendly 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 Plush - Great for side sleepers for extra comfort at the shoulders, hips and lower back 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 198167021317
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 X
SubFamily Name Knox
Mattress Top Type Tight Top
Mattress Type Hybrid
Product Type Mattress
Year of Launch 2024
Dealer Line National Line
Layer 1 Material Serta PillowSoft HD Foam
Layer 1 Thickness (in) 1.25
Layer 2 Material PillowSoft Aire
Layer 2 Thickness (in) 1
Layer 3 Material Cushion Gel Foam
Layer 3 Thickness (in) 1.5
Layer 4 Material PerfectConform Graphite Memory Foam
Layer 4 Thickness (in) 1
Layer 5 Material 5 ZoneActive Hybrid Design
Layer 5 Thickness (in) 8
Layer 6 Material Support Foam
Layer 6 Thickness (in) 1
Base Layer Material 5 ZoneActive Coil Unit
Product Depth (in) 79.5
Product Height (in) 13.75
Product Width (in) 39
Shipping Depth (in) 80
Shipping Height (in) 14.25
Shipping Width (in) 39.5
Product Weight (lb) 66.26
Shipping Weight (lb) 42
Adjustable Base Compatible? Yes
Antimicrobial? Yes
Breathable Construction? Yes
Coil Count 448
Coil Density 649
Coil Type Pocketed Coil
Coil Gauge 0.068"/0.074"
Cooling Technology? Phase change material
Edge Support? Yes
Foam Infusion? Graphite
Handles Included? Yes
Is Mattress 2 Sided? No
Latex Free? Yes
Mattress Comfort Level Plush
Mattress Cover Design Floral
Mattress Cover Stitch Design Floral
Mattress In A Box? No
Moisture-Wicking? Yes
Pillow Top? No
Product Accent Color Light Blue
Product Cubes 27.19
Quilted Cover? Yes
Side Color Dark Blue
Top Cover Color Black
Zipper Cover Machine Washable? N/A
Zipper Cover? No
Product Warranty Length 10
Does it Ship in a box Yes
Brand SERTA
Line Perfect Sleeper X
Type Tight Top
Width 13.75"
Height 39"
Depth 80"
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Professional delivery and installation is available for every product we sell. We would be happy to coordinate delivery and installation for you.
10 Year Limited Warranty
Serta® mattresses or foundations used with proper support are protected by a 10 year limited manufacturer’s warranty. Serta products are warrantied against manufacturing defects in workmanship and material (excluding covers and handles, except for handles on iSeries and equivalent level mattresses).
Exclusions
Comfort Preference
Bedding sold “as is”, or floor samples, or bedding purchased from second hand parties, non-retail establishments or received as a promotional item.
Bedding height
Corner guards
Bent perimeter border rods due to moving or bending the sleep set for innerspring models
Replacement of another piece in a sleep set unless it is also defective
Damage of the mattress or foundation due to misuse or abuse
Mattress damage due to an inappropriate foundation or when an incorrect bed frame is used
Sheet fit
Fabric Stains, soiling, fluid penetration, tears or burns
Adjustable foundations (see owner’s manual for details on warranty coverage)
Mattress fabric (except as noted in the Warranty Coverage Detail section for an All Foam mattress)
Zippered mattress cover damage due to improper care including removal of cover
Normal change in softness and recovery time associated with memory foam and latex materials over time. This does not affect the pressure relieving qualities of these materials.
Body impressions in the mattress that measure less than 1½" for an innerspring mattress; less than ¾" for all smooth top (non-quilted) hybrid mattresses and All Foam model mattresses.
Sagging in the mattress that measure less than 1½" for an innerspring mattress; less than ¾" for all smooth top (non-quilted) hybrid mattresses and All Foam model mattresses.
Term
The warranty coverage runs from the original date of purchase. Replacement of the mattress or foundation does not extend its limited warranty or begin a new limited warranty period. Your warranty period is based on the code printed on your white law label as indicated on the Warranty Code Chart. The duration of any applicable implied warranties, including but not limited to the implied warranties of merchantability and fitness, shall not exceed the term of this limited warranty. (Some states do not allow limitations on how long an implied warranty lasts, so this limitation may not apply to you.) Serta® shall not be liable for incidental or consequential damages that result from the use of your Serta® product. (Some states do not allow the exclusion or limitation of incidental or consequential damages, so this exclusion may not apply to you.) No expressed or implied warranties are extended to persons who purchase the product from anyone other than Serta Simmons Bedding Company or its authorized dealers, and all warranties to such persons, including the implied warranties of merchantability and fitness, are hereby excluded.
Service
If your Serta® mattress or foundation fails due to a manufacturing defect, the exclusive remedy under this warranty will be replacement of the defective product in the U.S., Puerto Rico or U.S. Virgin Islands. If the Serta® product you purchased is discontinued at the time of replacement, a current model of comparable quality and value will be selected. To receive service under the terms of this warranty contact your original Serta® dealer. If your original Serta® dealer is no longer in business or you have moved outside the service area, please contact Serta Customer Service at 1-888-55-SERTA (1-888-557-3782) between the hours of 9am to 5pm EST Monday - Friday. A copy of original bill of sale is needed to determine original date of purchase. Model name label and law label must be provided to identify the bedding and validate this warranty.
4.6
out of 5
89% of reviewers recommend this product.
Hybrid Serra mattress
Geraldine T
12/5/2025
Great for relief of my back pain so far
Originally posted on www.serta.com
Noce bed
William H
11/29/2025
Bought it with an adjustable base. Seems comfortable
Originally posted on www.serta.com
Comfy
Tammy P
11/26/2025
Just the right support, very comfortable
Originally posted on www.serta.com
Good Mattress
Francis M
11/23/2025
My new Serta mattress is great! I'am sleeping much better now that I have my new mattress! I recommend Serta mattresses.
Originally posted on www.serta.com
Good
Michael B
11/1/2025
Originally posted on www.serta.com
Comfy
Gary E
10/25/2025
No more back aches
Originally posted on www.serta.com
Great!
Gary E
10/19/2025
Comfy & good night's rest!
Originally posted on www.serta.com
Disappointing
Teresa H
10/15/2025
Already showing body imprints. Not really "cool" sleeping. It's just ok.
Originally posted on www.serta.com
Adjustable bed
Barbara E
10/13/2025
I like the bed but unhappy that I cannot use my head board and it is difficult to keep the top sheet secured.
Originally posted on www.serta.com
Comfort!!
Normand G
9/29/2025
Very comfortable mattress!
Originally posted on www.serta.com
Great mattress
Stephen m M
9/28/2025
Comfortable and supportive!
Originally posted on www.serta.com
Extremely comfortable
Pam C
9/20/2025
This mattress is so comfortable. It gives to your body but also supportive.
Originally posted on www.serta.com
Saved my back
Debbe H
9/19/2025
I have a lot of health issues with my back and haven't been able to find a mattress that is comfortable until now. Thank you so much.
Originally posted on www.serta.com
New Mattress
Nina T
9/18/2025
So far it's comfy
Originally posted on www.serta.com
Great quality
Maha A
9/18/2025
Comfy and nice matters
Originally posted on www.serta.com
New Mattress
Arthur T
9/18/2025
So star, so good!
Originally posted on www.serta.com
Best sleep ever!
Sherry S
9/14/2025
Very comfortable and supportive! Woke up after the first nights sleep with no up pain!!
Originally posted on www.serta.com
New mattress we love it
Kent S
8/25/2025
Very nice and supportive
Originally posted on www.serta.com
So far so good
Linda S
8/14/2025
Having slept on our new Serta Perfect Sleeper X Hybrid Knox Plush Cal King for two nights has been wonderful.
Supportive and comfortable for much needed good night sleep.
Originally posted on www.serta.com
So so
Patricia B
8/11/2025
Seems to stay indented where I sleep. Didn't think I would have that with such an expensive mattress. But seems to be comfortable.
Originally posted on www.serta.com
Plush
Jason S
8/3/2025
Mattress is plush and comfy. And a great fabric coloration.
Originally posted on www.serta.com
So comfy
Marisol R
7/11/2025
Originally posted on www.serta.com
Serra Mattress
Deborah T
7/5/2025
Perfect depth and comfortable
Originally posted on www.serta.com
Comfortable
Kimberly C
7/1/2025
Originally posted on www.serta.com
Great mattress
Adam C
6/14/2025
This mattress starts out firm at first but after a few nights sleep is very comfortable. I normally sleep on my back and it's very supportive of them mid to low back and cradled your body!
Originally posted on www.serta.com
Extremely comfortable
Edna B
6/6/2025
Comforting for a very relaxing sleep.
Originally posted on www.serta.com
Excellent Mattress
Erika P
6/5/2025
So very comfortable and cool!
Originally posted on www.serta.com
The best sleep in years
Susan T
5/20/2025
I had my other mattress for 15 years, and it was great until the last week. I knew I had to replace it. I went to Mattress Peddler as I had been there when friends mattress shopping and was impressed with the professionalism and kindness of the owner. I love the mattress I purchased. Just the right firmness. I am so happy
Originally posted on www.serta.com
Great sleep
Douglas E
5/20/2025
So glad we bought this one. Sleep is so much better.
Originally posted on www.serta.com
New mattress and box spring
James K
5/14/2025
Seems to be a great mattress
Originally posted on www.serta.com
"It's good, I like it!"
Jeremy H
4/19/2025
These are the words of the wisest, smartest, and most beautiful person in the world: My Wife.
Passes the wife test, passes my test.
Originally posted on www.serta.com
GREAT MATRESS !!
CA2025
4/19/2025
Perfect firmness for both my wife and my needs. Slept like I didn't have kids waking me up every few hours again.
Originally posted on www.serta.com
Very comfortable.
Dan24
4/7/2025
I'm very happy with my new mattress. I've been using it for a few weeks now, and my body feels more rusted and less pain when waking up.
Originally posted on www.serta.com
Take a pass on the whole thing
FredTX
4/6/2025
Extremely poor product and customer service. RXO Logistics - if a company uses them for last mile move along to someone else - save yourself the hassle. Canceled my delivery at the last minute - unable to provide any information on whereabouts of the mattress. Wound up canceling the order. To make matters worse, I ordered the mattress from a retailer and am now returning it. Hard as a rock! Nothing plush about it including the pillow top. Make another selection.
Originally posted on www.serta.com
New mattress
Cleveland G
4/3/2025
Originally posted on www.serta.com
Firm
Mel V
4/2/2025
Don't have any issues with the bed or service. Customers should know this bed is very firm.
Originally posted on www.serta.com
Exceptional comfort
Ceren O
3/27/2025
Nice cooling down at night
Originally posted on www.serta.com
Happy Happy Happy
Cynthia D
3/26/2025
Originally posted on www.serta.com
A Perfect Balance of Comfort and Support!
DrJLD
3/25/2025
We absolutely love our Serta mattress! At first, it felt a bit stiff, but after a few days of breaking it in, it became incredibly comfortable. We made the switch from our previous pillow top options because they kept breaking down too quickly, and we're so pleased with our decision. This mattress provides great support and feels much more durable. Overall, we couldn't be happier with our purchase!
Originally posted on www.serta.com
Restful sleep
Margaret M
3/22/2025
Our mattress was 20 years old. This mattress is so comfy. Not too soft not too hard. Jyst right.
Originally posted on www.serta.com
Perfect!
Keith L
3/22/2025
I was looking for more support something not too hard and not too soft and I settled for the plush and it's perfect!
Originally posted on www.serta.com
Comfortable
Jason S
3/22/2025
Originally posted on www.serta.com
Comfortable
Bryan F
3/14/2025
Originally posted on www.serta.com
Fantastic support!
Michelle S
3/9/2025
This mattress is so comfortable! Perfect amount of softness on the top to support my curves with great firm support beneath. I am just giddy to climb into bed each night. I don't know why I didn't buy a new mattress sooner. I had no idea what I was missing!
Originally posted on www.serta.com
Doesn't feel like it did in the store
Wayman T
2/22/2025
Hoping it will soften soon
Originally posted on www.serta.com
Bad quality
Mattori
2/22/2025
I just started sleeping on this mattress and it has a horrible bubble in the middle. This is the cool calming queen mattress. It's a replacement for a different mattress from serta and it only lasted 6 months before the sides started caving in. I will never buy a serta mattress again.
Originally posted on www.serta.com
Comfortable!
Marcy M
2/17/2025
Definitely comfy!
Originally posted on www.serta.com
Excellent!
Kimberly A
2/16/2025
Great first nights sleep!
Originally posted on www.serta.com
What a nightmare
Wheresmymattress
2/13/2025
Hard to review a mattress when it has yet to arrive. Just the fact they asked me to review the mattress means they have no idea I don't have it yet. The Shipping company Serta uses lost the first mattress. Had to wait for Serta to manufacture another one. Now the delivery company keeps pushing delivery dates back on us. 2 months now
Originally posted on www.serta.com
Emankcin
1/31/2025
Very comfortable mattress for me. Firm but not too firm. No more back ache.
Originally posted on www.serta.com
