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Sealy

Sealy Posturepedic®13" Medium Mattress

$799
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Size: Twin

The reference point of the whole Sealy wall

When someone asks where to start on the Sealy row, this is the answer: the core Posturepedic at thirteen inches, a true-medium 5 out of 10. It carries the one idea the entire brand is built on, support zoned to push back where your body is heaviest, without the tiers, tops, or cover technologies layered above it. Learn this bed and every fancier Sealy suddenly makes sense as "this, plus something."

The Posturepedic idea, undiluted

Your midsection is roughly half your body weight, and on an evenly-soft bed it sinks first; that is the hammock that backs complain about. The Posturepedic coil unit grades its pushback to hold that center third level while the comfort foams up top handle shoulders and hips. That is the whole machine; there is no hidden trick.

Read the build from the bottom up, because that order is the point of the bed. The supportive coil unit does the structural work, firmest through the center third where your weight concentrates, so the surface stays level. The comfort foams above it are tuned for pressure relief at the shoulders and hips, the part you feel in the first second. The breathable, open-cell cover on top keeps heat from pooling. Thirteen inches, every inch doing the named job.

The first five minutes lying on it

What you notice first is cushion at the surface, a soft initial touch that does not read as firm. Stay still and the character changes: the zoned coils assert themselves the longer you lie there, and the center of the bed comes up to meet your lower back. That two-stage feel, give at the top and structure underneath, is exactly what a true medium should do, and it is the best reason to test this bed in person rather than judge it from a thirty-second sit. Roll from your back to your side and the 5 out of 10 cooperates with the change instead of fighting it.

Who the baseline serves outright

Back sleepers of average build may honestly never need more than this; zoned support at a medium tune is most of what a spine ever asks for. Combination sleepers get a medium that cooperates with every position change. First-time buyers get the brand's actual engineering, the core idea without the tier tax. The ones who should keep walking: dedicated side sleepers who need a softer entry to cradle the shoulder, and heavier sleepers who will appreciate a denser build. You two are the reason the rest of the wall exists: start softer or denser, respectively. If denser is your read, the Posturepedic 13" Ultra-Firm is the same machine tuned to the firm end of the scale.

Living with it over time

The cooling comes from a breathable cover and open-cell comfort materials that help heat move instead of build, so think of it as steady rather than aggressively cold. Motion control is good and the bed stays supportive and steady, but a zoned coil design like this transfers more movement than a dense all-foam or pocketed-coil bed, so a very motion-sensitive partner is worth a frank conversation on the floor. The foams are CertiPUR-US certified, it is backed by a 10-year limited warranty, and it is built to work flat or on an adjustable base if you want to raise the head or foot.

If medium turns out to be the wrong call

A medium is the safest first guess, and it is still a guess until you have slept on it for a couple of weeks. So this bed carries 90-night comfort trial on select Sealy models. If medium is not your answer, you exchange it for store credit toward any bed of equal or greater value and pay the difference, no cash refund and no restocking-fee games. By then you will know whether you needed softer or firmer, and you will swap with the direction settled instead of guessing twice.

Use it the way the team uses it

On the Mattress Overstock floors this bed is the calibrator. Lie here for five minutes, learn what zoned-medium feels like, then test the rest of the lineup against it; every upgrade either justifies itself against this baseline or it does not. The DreamCloud hybrids across the aisle make the same five-minute argument from a different school of thought. It is a floor staple at all five Kentucky showrooms (Lexington, Richmond, Georgetown, London, and Somerset), no appointment needed, so you can lie on this exact mattress in your own sleeping position before you decide. When your size is in stock, the Mattress Overstock crew delivers free across the Kentucky service area, sets it up, and hauls your old mattress away. Because everyone on the floor is paid the same no matter which brand you choose, the guidance you get is honest. Select your size to see the live Mattress Overstock price.

Size: Twin

What makes this mattress different

True-medium tuning

A 5 out of 10 on the firmness scale, Sealy's center line: cushion at first touch, with zoned coils that assert themselves the longer you lie still.

Zoned coil support

The supportive coil unit grades its pushback, firmest through the center third where body weight concentrates, so your spine stays level instead of hammocking.

Pressure relief

The upper comfort foams are tuned to reduce pressure buildup at the shoulders and hips, the part you feel in the first second.

Cooling

A breathable cover and open-cell comfort materials help heat move instead of build, so it sleeps steady rather than aggressively cold.

Motion control

Good, supportive and steady, but a zoned coil design transfers more movement than a dense all-foam or pocketed-coil design, so a very motion-sensitive partner is worth a floor conversation.

Adjustable-base ready

Built to work flat or on an adjustable base if you want to raise the head or foot.

90-night comfort trial on select Sealy models

90-night comfort trial on select Sealy models: if medium is not your answer, exchange for store credit toward a bed of equal or greater value (no cash refund).

The build

Zoned support, nothing else in the way

Read this bed from the bottom up, because that order is the whole point. The supportive coil unit does the structural work and grades its resistance, firmest through the center third where body weight concentrates, so the surface stays level instead of hammocking. The comfort foams above it land the true-medium feel and take care of pressure relief at the shoulders and hips, the part you notice in the first second. A breathable, open-cell cover on top keeps heat from pooling. Thirteen inches total, every inch doing the named job, with no tier tops or cover technologies layered on. CertiPUR-US certified foams; backed by a 10-year limited warranty.

Who it fits

The honest baseline

Back sleepers, average build: zoned support at a medium tune is most of what your spine ever asked for; many never need more than this.

Combination sleepers: the 5 out of 10 cooperates with every position change instead of fighting it.

First serious mattress: the brand's core engineering without the tier tax, a clean baseline to learn what zoned-medium feels like.

Couples, with one caveat: motion control is good, but a zoned coil bed transfers more movement than dense foam, so a very motion-sensitive partner should test it together on the floor first.

Dedicated side sleepers: you may want a softer entry to cradle the shoulder; this is the place to start, then move softer if the shoulder asks for it.

Heavier builds: you will likely appreciate a denser build, and the 90-night comfort trial on select Sealy models means a starting-medium read can be exchanged toward a firmer bed if it is not enough.

Specifications

Height13"
FeelMedium
Firmness5 out of 10 (10 = firmest)
ConstructionCooling cover + comfort foams + supportive coil unit
CoolingBreathable cover and open-cell comfort materials help reduce heat buildup
Motion isolationGood - supportive and steady, but it transfers more movement than a dense foam or pocketed-coil design
Adjustable baseYes, compatible with adjustable bases
CertificationsCertiPUR-US certified foams
Warranty10-year limited warranty
Trial period90 nights on select models

Frequently asked questions

How firm is the Posturepedic 13" Medium?

5 out of 10, Sealy's center line. Cushion at first touch, with the zoned coils asserting themselves the longer you lie still.

What does "Posturepedic" actually mean?

Zoned support: the coil unit pushes back hardest under your midsection, which carries about half your weight, keeping your spine level instead of hammocked. It is the engineering claim the entire line is named after, and this bed is it in its purest form.

What if medium is not my answer?

That is what the 90-night comfort trial on select Sealy models is for. Give it a couple of weeks to break in, and if medium is not right, you exchange it for store credit toward any bed of equal or greater value and pay the difference. No cash refund, but no restocking-fee games either. By then you will know whether you needed softer or firmer.

Will it work with an adjustable base?

Yes. It is built to work flat or on an adjustable base if you want to raise the head or foot.

How does it sleep for couples and motion transfer?

Motion control is good and the bed stays supportive and steady, but a zoned coil design transfers more movement than a dense all-foam or pocketed-coil bed. If your partner wakes easily, test it together on the floor before you decide.

Does it sleep hot?

The breathable cover and open-cell comfort materials help heat move instead of build, so think of it as steady rather than aggressively cold.

Is there fiberglass in it, and is it certified?

The foams are CertiPUR-US certified, and the bed is backed by a 10-year limited warranty. For the exact materials list on the size you are considering, ask the floor and we will pull the spec sheet with you.

How is this different from the firmer Sealy in the same line?

The Posturepedic 13" Ultra-Firm is the same zoned-coil machine tuned to the firm end of the scale. Lie on this medium first as your calibrator, then test the Ultra-Firm against it; the difference between them tells you more than either page can.

Can I see this mattress in person near me?

Yes, and with a mattress we would always rather you did. Mattress Overstock is a Kentucky-owned company that has served the state since 2012, with five showrooms you can visit: Lexington (on Nicholasville Road), Georgetown, Somerset, London, and Richmond. Come lie on this exact mattress in your own sleeping position before you decide. We deliver free across our Kentucky service area, set it up, and haul your old mattress away, and because everyone on our floor is paid the same no matter which brand you choose, the guidance you get is honest.

Why buy it from Mattress Overstock

Buy it from people you can actually visit

  • Free local delivery To your home across Central & Eastern Kentucky.
  • Free setup We place and set up your new bed in the room.
  • Free old-mattress haul-away The old one goes out the same day the new one comes in.
90-night comfort trial on select models See exchange policy for details
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Independently owned in Kentucky since 2012. Walk in any day (no appointment) and someone who actually knows the floor will help you find the right fit.

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Try it in person at any Kentucky showroom

Walk into any Mattress Overstock location, lie down, and feel the difference yourself. No appointment, no pressure. Our team has over 100 years of combined mattress experience and we're here to help you find the right fit.