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 Firm - Ideal for stomach and back sleepers with extra support 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 198167021362
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 Firm HD Foam
Layer 1 Thickness (in) 1
Layer 2 Material PillowSoft Aire
Layer 2 Thickness (in) 1
Layer 3 Material Cool Twist Gel Foam
Layer 3 Thickness (in) 0.5
Layer 4 Material PerfectConform Graphite Memory Foam
Layer 4 Thickness (in) 1
Layer 5 Material Serta Support Foam
Layer 5 Thickness (in) 1
Layer 6 Material 5 ZoneActive Hybrid Design
Layer 6 Thickness (in) 8
Layer 7 Material Support Foam
Layer 7 Thickness (in) 1
Base Layer Material 5 ZoneActive Coil Unit
Product Depth (in) 79.5
Product Height (in) 13.5
Product Width (in) 39
Shipping Depth (in) 80
Shipping Height (in) 14
Shipping Width (in) 39.5
Product Weight (lb) 65.86
Shipping Weight (lb) 41
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 Firm
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 26.72
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 13.5"
Height 39"
Depth 80"
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Delivery
Just Beds offers professional delivery and installation for every mattress and bedroom accessory. Enjoy premium service tailored to fit your schedule.
$25 Mattress Delivery
$25 delivery is also available on any mattress set purchase of $599 or more. Just Beds offers delivery of your new matterss set within a 35-mile radius of any of our 5 great mattress store locations in Georgia and South Carolina.
Free Mattress Setup
Let us do the work for you. Our team of mattress delivery professionals will setup your new mattress set in your home - disposing of all packaging materials, leaving your home spotless.
Free Mattress Removal
After your new mattress set is installed in your home, we will also remove and dispose of your old mattress set free of charge. Our goal is to provide you with a convenient, seamless process in the purchase and delivery of your new mattress.
Warranty and Exchange Policy
Just Beds employs highly trained sleep specialists that will help you find the mattress of your dreams. Our sleep specialists are trained to ask you questions about your sleep patterns, preferred sleeping positions, and comfort and support preferences. We ensure that you, our valued customer, will start sleeping better in a mattress that is perfect for you. Click HERE to contact us for assistance.
45-Night Comfort Exchange Policy
At Just Beds, you can buy with confidence. It could take a few weeks for your body to adjust to a new sleeping surface. Sleep on your mattress for 30 nights, and if you are not fully satisfied, you may exchange your mattress for one of the same size, of equal or greater value. Your only financial responsibility is a $75.00 processing and transportation fee, as well as any difference in new mattress price. All exchanges must be made between the 30th and 45th night after delivery.
4.7
out of 5
93% of reviewers recommend this product.
Had a full nites sleep!
Linda F
4/4/2026
Wanted firm. Got firm.
Kept firm didnt sink in...
I slept 12 hours straight instead of adjusting & waking up every 2 hours and woke up with zero aches & pains! Its night #4... im hoping it will last days weeks months & years to come ?
Originally posted on www.serta.com
Best Mattress Ever!
Jill M
4/1/2026
Firm, but not too firm, felt supported and blissful from the very first night...best sleep I've had in months!
Originally posted on www.serta.com
Ashley Furniture
Sarah A
3/27/2026
Great firm mattress
Originally posted on www.serta.com
Nice mattress
Trent W
3/27/2026
Firm but not extra firm with some top foam. It's nice!
Originally posted on www.serta.com
Excellent firm mattress
Alexander M
3/22/2026
Very supportive
Originally posted on www.serta.com
Perfect Sleeper
Cari T
3/21/2026
This mattress will be "perfect" as soon as my back adjusts to the firmness. I do like the comfiness of the top layer and the mattress is supportive.
Originally posted on www.serta.com
Excellent mattress
Wayne W
3/21/2026
We like the mattress very much
Originally posted on www.serta.com
Firm
Lisa A
3/16/2026
Firm and supportive
Originally posted on www.serta.com
Nice firm mattress
Nicole R
3/16/2026
We replaced a failing mattress with this Serta Hybrid... it nicely firm and supportive, but not overly hard. It sits a little higher up than previous mattresses (maybe due to the matching foundation?) but my tall husband appreciates the extra height.
Originally posted on www.serta.com
Mattress
William W
3/13/2026
Originally posted on www.serta.com
Best Night Sleep Period.
Carin Z
3/9/2026
When the mattress arrived it was just great, no weird smell and looked exactly like the showroom model. It's very firm which helped my herniated disc. I work hard and I need to recharge at night, not toss and turn. It's perfect for me and I'm glad I chose this one. The design and color are also very attractive to the eye. One of the best features of my purchase was the mattress protector with cooling technology. It's in there! I slept well and could notice the difference in temperature immediately. I highly recommend.
Originally posted on www.serta.com
Best option
Emily S
3/6/2026
very comfortable mattress, it's the perfect option I was looking for
Originally posted on www.serta.com
Perfect Sleeper
David H
3/3/2026
Great Mattress, pleased with the price we paid. Happy Customer !!
Originally posted on www.serta.com
Great mattress
Stan A
2/20/2026
Very firm mattress. Helps with my back pain
Originally posted on www.serta.com
Comfortable nights rest
Elaine M
2/20/2026
Supportive & just the right amount of softness
Originally posted on www.serta.com
Grwat
Ronnie S
2/14/2026
Originally posted on www.serta.com
Firm
James R
2/7/2026
Looking forward to sleeping on a flat surface.
Originally posted on www.serta.com
Great Product
Christian Q
2/3/2026
Comfy and exactly what we were looking for!
Originally posted on www.serta.com
Serta Firm
James L
2/3/2026
Very supportive
Originally posted on www.serta.com
Perfect Sleeper
Linda S
1/25/2026
So so good! Very comfy and cozy and great for my back!
Originally posted on www.serta.com
Adjustable bed
Paul W
1/23/2026
It feels so good to wake up refreshed!
Originally posted on www.serta.com
So far only 2 nights in
Henry D
1/10/2026
So far so good. Went from queen to king. Plenty of room now for the 2 of us. Seems to be doing it's job.
Originally posted on www.serta.com
serta perfect sleeper x Knox 13.5
Gloria S
12/24/2025
The mattress is super firm and comfortable. I am happy. I recommend for people who have joint bone problems and especially the back
Originally posted on www.serta.com
Great support
Rita D
12/21/2025
Very firm! Exactly what was wanted and received!
Originally posted on www.serta.com
Serta Perfect Sleeper
Jasmin M
12/21/2025
So far so good. I do like it better than my previous mattress which was more of a soft pillow top firm plush mattress. It was too soft and my back would hurt a lot. So I'm hoping this firm sleeper will do wonders but so far it feels great
Originally posted on www.serta.com
Exelent for my back
Fernando F
12/13/2025
good Support for my back
Originally posted on www.serta.com
Sink hole
Linda S
12/13/2025
When I first got this replacement, it was great, and now, for the last four months I've been dealing with a sink hole and is killing my lower back.
Originally posted on www.serta.com
Comfy!
Debbie H
12/12/2025
Nice and firm, very comfortable and I do not want to get out of bed!!
Originally posted on www.serta.com
Getting to know each other
Kendra B
12/8/2025
First few nights was a little stiff. But now settling in and super comfortable.
Originally posted on www.serta.com
The best for best price.
Mayra V
12/5/2025
Great strong and soft mattress for rest and sleepful.
Originally posted on www.serta.com
Truly the Perfect Sleeper!
Susan A
12/4/2025
Perfect amount of firmness and comfort; definitely helped with healing my total hip replacement.
Originally posted on www.serta.com
Feels great
Rick Y
11/30/2025
Very comfortable and woke pain free. Great product
Originally posted on www.serta.com
Firm and comfortable
Ronda S
11/22/2025
Love new mattress. Side sleeper and it is not too firm to cause discomfort. Highly recommend.
Originally posted on www.serta.com
New and nice!
Yasmeen S
11/17/2025
Comfy so far. Lets see how it lasts!
Originally posted on www.serta.com
Bush & Gilles - Single XL
Charlene S
11/8/2025
Seems to be a great mattress
Originally posted on www.serta.com
Nice mattress
John K
11/1/2025
Nice mattress but they just dropped the price $500 after I bought it
Originally posted on www.serta.com
Great
Linda S
11/1/2025
Thanks for the quality product and 10 year quality assurances.
Originally posted on www.serta.com
New firm mattress
Kathleen M
11/1/2025
My rest test told me I needed more lumbar support with my arthritis. Been 12 years since we had a new mattress. It was time. Very tall though so have deep pocket sheets on hand. Glad I have bed steps.
Originally posted on www.serta.com
Best mattress ever!
Valerie M
10/31/2025
Comfy, supportive, firm edges. I returned a Casper mattress and got this Perfect Sleeper X. Back pain gone after first night and I sleep through the entire night now!
Originally posted on www.serta.com
Wonderful!!!!!!!!!!
Michael M
10/30/2025
No more sagging mattress, very supportive.
Originally posted on www.serta.com
Very Comfortable
Jeff L
10/17/2025
No more aches and pains when I wake up in the morning.
Originally posted on www.serta.com
Serta
Bertha S
10/13/2025
I like a firm mattress and this fits my needs
Originally posted on www.serta.com
Bed
Greg H
10/13/2025
Originally posted on www.serta.com
Great mattress
Marsha M
10/11/2025
Comfortable, great night sleep
Originally posted on www.serta.com
Good product
Sheila T
10/5/2025
Comfortable and easy delivery… grateful.
Originally posted on www.serta.com
So far so good!
Alin K
10/2/2025
I've only slept on my new mattress five nights and I really like it already.
Originally posted on www.serta.com
So far so good!
Vincent W
9/30/2025
First week down. Mattress is very supportive.
Originally posted on www.serta.com
Sleep like a baby
Cindy D
9/22/2025
So firm! I love it!
Originally posted on www.serta.com
Excellent
Katherine H
9/21/2025
Supportive yet still feel I can sleep on my side comfortably!
Originally posted on www.serta.com
bad product
Josif B
9/20/2025
Originally posted on www.serta.com
