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Serta Perfect Sleeper X Quilted Hybrid Level 1 Knox Plush

GoodBed Expert Review
Our Take on Serta Perfect Sleeper X Quilted Hybrid Level 1 Knox Plush

Founder of GoodBed
Michael Magnuson

Founder of GoodBed, Leading Mattress Expert

Bottom Line - Is the Serta Perfect Sleeper X Quilted Hybrid Level 1 Knox Plush the right mattress for you?
Bottom line best icon BEST if you
  • Want a soft mattress
  • Are either a side or back sleeper
  • Are very easily disturbed by other movements in the bed (motion isolation is exceptional)
  • Often sit or sleep along the edge of your bed (edge support is very good)
  • Enjoy sleeping just a bit more 'in' your mattress than 'on' it
  • Like a little bounce in your mattress, but not much
Bottom line not ideal icon NOT IDEAL if you
  • Are a stomach sleeper, especially if you weigh more than 250 lb
  • Want a natural or organic mattress (though this mattress is still OK in terms of avoiding harmful chemicals)
Sounds good so far? Get the full details.

The Perfect Sleeper X Collection adds new memory foam and a new five-zone coil unit. Is it right for you?

See our full review

GoodBed Ratings

Our Measurements and Scores for the Serta Perfect Sleeper X Quilted Hybrid Level 1 Knox Plush
These attributes are not 'better' or 'worse' — they should be judged solely on your personal preference.
Softness
Soft (7)
Cushioning
Depth
Slightly Deep (6)
Memory Feel
Medium-Low (4)
Bounce
Medium-High (6)
Durability
Good (7)
Warranty
10-year
warranty
Quality
Good (7)
Spinal alignment depends on "fit" between your body and the mattress.
Lighter Weight
(<150 lb.)
Side Sleeper
Back Sleeper
Stomach Sleeper
Very Good (8)
Good (7)
Good (7)
Average Weight
(150-200 lb.)
Side Sleeper
Back Sleeper
Stomach Sleeper
Very Good (8)
Good (7)
Pretty Good (6)
Above Average
Weight
(200-250 lb.)
Side Sleeper
Back Sleeper
Stomach Sleeper
Good (7)
Good (7)
OK (5)
Heavier Weight
(>250 lb.)
Side Sleeper
Back Sleeper
Stomach Sleeper
Pretty Good (6)
Good (7)
Fair (4)
Pressure relief depends on "fit" between your body and the mattress, and is most important for side sleepers.
Lighter Weight
(<150 lb.)
Typical Curves
Extra Curvy
Excellent (9)
Very Good (8)
Average Weight
(150-200 lb.)
Typical Curves
Extra Curvy
Very Good (8)
Very Good (8)
Above Average
Weight
(200-250 lb.)
Typical Curves
Extra Curvy
Good (7)
Good (7)
Heavier Weight
(>250 lb.)
Typical Curves
Extra Curvy
Good (7)
Good (7)
These attributes can be 'better' or 'worse' — but may or may not be a priority for you.
Motion
Isolation
Exceptional (10)
Sleeps Cool
Good (7)
Edge Support
Very Good (8)
Reposition
Ease
Good (7)
Green
Features
OK (5)
Adjustable
Base
Suitability
Good (7)

Materials & Construction

Layer Details
Cover 2.25″ quilted cover (w/ "PerfectPure Fiber and CoolFeel Technology")
Comfort Layers 1.5″ poly foam ("CushionGel Foam")
Transition Layers 1″ memory foam ("Perfect Conform Graphite Memory Foam")
Support Layers
  • 8″ pocket springs (1000+ coil density lumbar-zoned "5-ZoneActive Hybrid Design")
  • 1″ poly foam ("Serta Support Foam")
Total Thickness 13.75''

Compare These Products
Serta Perfect Sleeper X Quilted Hybrid Level 1 Knox Plush vs. Other Beds

Compare the Serta Perfect Sleeper X Quilted Hybrid Level 1 Knox Plush mattress side by side with other Serta models, or with mattresses from other brands.

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Where to Buy
Serta Perfect Sleeper X Quilted Hybrid Level 1 Knox Plush

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Benefits to Buying from Serta
  • Free delivery
  • Return policy
  • Financing available

Frequently Asked Questions
Serta Perfect Sleeper X Quilted Hybrid Level 1 Knox Plush

  • In our evaluation of the Serta Perfect Sleeper X Quilted Hybrid Level 1 Knox Plush mattress, we found it to be a Soft (7) on the GoodBed rating scale (1= firmest, 9 = softest).
  • Yes, the Serta Perfect Sleeper X Quilted Hybrid Level 1 Knox Plush mattress is adjustable base compatible. This means it is designed to be used on an adjustable base without incurring damage or voiding the warranty. In our review of this mattress, we tested it on an adjustable base to look for any adverse effects as the head and foot are elevated, and to see how well it conforms to the contours of the base both with and without the weight of a sleeper. Overall, we found the Knox Plush to have good adjustable base compatibility.
    • Length: 10-year warranty.
    • Indentation coverage: 1.5" and deeper.
    • Proration: 10 years of full ("non-prorated") replacement coverage.
  • Here are the in-home trial details for mattresses purchased from the Serta website:

    • Policy: Comfort Guarantee -- Mattresses can be returned for refund (after 30 day minimum trial).
    • Fees: A 15% return fee + $200 for return shipping is deducted from the amount credited for returns.
    • Notes: The iComfort/iSeries In-Home Trial Period is 120 nights. For other products, Serta's Comfort Assurance program is 45 nights.
  • Here are the delivery terms for mattresses purchased from the Serta website:

    • Policy: Delivery available - Free with any mattress purchase
    • Set-up: Set-up provided free with delivery
    • Removal: Removal of old mattress provided free with delivery
    • Notes: Free “white glove” (2-person) delivery to your bedroom. Includes unpacking and set-up as well as removal of packaging and old bedding if needed.

Expert Q&A

See questions from other mattress buyers

Other Models from Serta

Additional Information

General Description

(Product description from Serta)

A plush-feel supportive 13.75” quilted mattress with a layer of 5 zoned coils for full-body spinal alignment, plus graphite-infused memory foams for xtra comfort.

Materials & Construction

  • Our 5 ZoneActive™ Design combines coils and contouring memory foam for full-body alignment designed to offer comfort and support where you need it most.
  • Experience targeted pressure relief with Perfect Conform™ Memory Foam that contours and cradles your pressure points for restorative sleep.
  • Sleep comfortably throughout the night with cooling technology and 1” of graphite-infused memory foam that redistributes heat away from your body.
  • 100% USA Assembled
  • Law Label Lookup Model Number: 500100092

Responsibly crafted

  • CertiPUR-US® Certified means our foam was tested for and is free from harmful chemicals and gasses

Compatibility

  • Compatible with most frames, including: traditional frames, box springs, platform frames, slatted frames, bunky boards, and adjustable frames.

Warranty

  • Length: 10-year warranty.
  • Indentation coverage: 1.5" and deeper.
  • Proration: 10 years of full ("non-prorated") replacement coverage.

About This Model

Status Active (released 2024)
Manufacturer Serta
Line Serta Perfect Sleeper X
Collection Serta Perfect Sleeper X Quilted Hybrid Level 1
Comfort Level Soft
Surface Type Tight Top
Support Type Innerspring
Build Details
  • No-Flip
  • Works with an adjustable base
  • Mattress Thickness: 13.75"

Corrections

Have an update or correction to our information about Serta Perfect Sleeper X Quilted Hybrid Level 1 Knox Plush? If so, please take a moment to suggest an edit.

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