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Sealy
Sealy Maximum Defense Mattress Protector

Sealy Maximum Defense Mattress Protector

4.6(27 ratings)

Best price now

$55.99at JCPenneyObserved at 7:10 AM

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Our take on the Sealy Maximum Defense Mattress Protector

The Sealy Maximum Defense is a zippered, full-encasement mattress protector in a polyester-nylon blend. It claims waterproofing, an allergen barrier, antimicrobial treatment, bed bug blocking and moisture wicking, and it fits mattresses up to 14 inches deep. In Twin it measures 39 by 75 inches. The best new price is $55.99 at JCPenney as of November 7, 2026, with two stores carrying it new.

Best forAllergy sufferers wanting a full encasementHouseholds dealing with bed bugsRenters and guest roomsProtecting a mattress from spills and stains
Pros
  • Full zippered encasement covers all six sides, not just the top
  • Waterproof backing blocks spills and accidents
  • Allergen and bed bug barrier claims suit allergy and infestation concerns
  • Machine washable for routine cleaning
  • Fits mattresses up to 14 inches deep
Cons
  • Polyester-nylon fabric can feel warm and crinkly under sheets
  • Encasement style makes changing it more work than a fitted protector
  • Only the Twin size is specified here; other sizes and prices vary
  • Waterproof membranes can trap heat for hot sleepers

Sealy Maximum Defense Mattress Protector prices at every store

  • JCPenneyNew

    In stock

    $55.99Observed at 7:10 AM
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  • eBayCheck price at eBay

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Sealy Maximum Defense Mattress Protector price history

Lowest price we've seen: $55.99 on Nov 7 at JCPenney. Tracked across 1 store since Nov 7.

What reviewers say

  • 4.6 / 527 ratings

Ratings are strong at 4.6 out of 5 from 27 ratings, and buyers generally treat it as a functional barrier protector rather than a comfort layer.

What people mention
  • FitPraisedBuyers say the zippered encasement goes on easily and fits deep mattresses.
  • WaterproofingPraisedOwners report it keeps spills and accidents off the mattress.
  • Fabric feelMixedSome find the polyester-nylon surface less soft than a fitted protector.
  • NoiseCriticisedA few mention crinkling under the sheets.
  • WarmthMixedThe waterproof layer can sleep warmer than bare bedding.

Specifications

Size
Twin
Type
Mattress Protector
Material
Polyester (88%), Nylon (12%)
Protection Properties
Waterproof, Allergen Barrier, Antimicrobial, Bed Bug Blocker, Moisture Wicking
Length
75 Inches
Width
39 Inches
Thickness
Up To 14 In Deep (Mattress Depth)

Questions and answers

Does it cover the whole mattress?
Yes. It is a zippered encasement that covers the top, sides and bottom, unlike a fitted protector that only covers the top.
Will it fit my mattress depth?
It fits mattresses up to 14 inches deep. Measure your mattress before ordering, especially if you use a topper.
Is it machine washable?
Yes, it is machine washable. Wash on a gentle cycle and tumble dry low to protect the waterproof membrane.
Does it really stop bed bugs?
It is marketed as a bed bug blocker and encases the mattress fully, which helps contain an infestation. It does not treat the room, so pair it with other bed bug measures.
Is $55.99 a good price for the Twin?
That is the best new price found, at JCPenney as of November 7, 2026. Only two stores list it new, so comparison shopping is limited.
Is it hot to sleep on?
The waterproof layer can feel warmer than bare bedding. Hot sleepers may notice it more in summer.
Where is the Sealy Maximum Defense Mattress Protector cheapest?
At JCPenney, for $55.99, as of our latest check.
What do buyers say about the Sealy Maximum Defense Mattress Protector?
Rated 4.6 out of 5 from 27 ratings.
Where can I buy the Sealy Maximum Defense Mattress Protector?
2 stores we checked sell it, including JCPenney, eBay.

Stores we've priced the Sealy Maximum Defense Mattress Protector at

  • JCPenney deals and prices

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All Sealy deals and products →
Color
White
Care Instructions
Machine Wash
Closure Type
Zippers
Age Range
ADULT
Solution For
Bed bugs, Allergies, Spills and stains
Typical Users
UNISEX