Sealy
Sealy Posturepedic Memory Foam Firm 11" Mattress
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Sealy Posturepedic Memory Foam Firm 11" Mattress at Mattress Overstock
Sealy Posturepedic Memory Foam Firm 11" Mattress is a Sealy mattress to compare for Posturepedic support, comfort-layer feel, edge support, and base compatibility. The title gives you the starting point—a Firm feel; a 11-inch profile; memory-foam, foam—but the showroom test is where you learn whether it works for your shoulders, hips, lower back, partner movement, room height, and base setup.
What makes this mattress different
Pressure relief
The upper comfort layers are tuned to reduce pressure buildup at the shoulders and hips.
Cooling
Breathable cover and open-cell comfort materials help reduce heat buildup
Motion control
Excellent - layered foams absorb movement before it reaches the other side of the bed
Adjustable-base ready
Yes, compatible with adjustable bases
Sealy Posturepedic support is built around alignment, not just softness
Sealy uses the support core and zoning to keep your midsection from sagging first, then tunes the upper comfort layers around that foundation.
As you move from basic Posturepedic models into Plus and Elite builds, the main changes are in cooling, edge support, and how much cushioning sits over the support unit.
Compared with the Sealy Posturepedic Memory Foam Medium 12", the Sealy Posturepedic Memory Foam Firm 11" is firmer and flatter than the Sealy Posturepedic Memory Foam Medium 12". That is the practical difference you feel in the showroom: the firm surface changes how deeply you settle in, while the underlying support build changes how easy it is to move and how steady the edge feels.
Shop all Sealy mattresses →Built for the way you actually sleep
Back sleepers - The flatter, sturdier surface keeps the midsection from dipping too far, which is usually the reason shoppers move into the firm version.
Stomach sleepers - This is the safer choice if you need more pushback through the pelvis and lower back than a medium model usually gives.
Hot sleepers - Cooling details in the cover and upper layers help, but if temperature is your top issue, the hybrid or step-up cooling model is usually the smarter comparison.
Shoppers cross-shopping the lineup - If the Sealy Posturepedic Memory Foam Firm 11" feels either too flat or too plush in person, the closest adjustment is usually the Sealy Posturepedic Memory Foam Medium 12".
Specifications
| Height | 11" |
|---|---|
| Feel | Firm |
| Firmness | 8 out of 10 (10 = firmest) |
| Construction | Cooling cover + pressure-relief memory foam + transition layer + high-density support core |
| Cooling | Breathable cover and open-cell comfort materials help reduce heat buildup |
| Motion isolation | Excellent - layered foams absorb movement before it reaches the other side of the bed |
| Adjustable base | Yes, compatible with adjustable bases |
| Certifications | CertiPUR-US certified foams |
| Warranty | 10-year limited warranty |
| Trial period | 90 days at Mattress Overstock |
Frequently asked questions
How firm is the Sealy Posturepedic Memory Foam Firm 11"?
We rate it 8 out of 10 (10 = firmest). In practical terms, that puts it in the firm part of the lineup. The right fit depends on your sleeping position, body type, and whether you like to sleep more on top of the mattress or more in it.
How is the Sealy Posturepedic Memory Foam Firm 11" different from the Sealy Posturepedic Memory Foam Medium 12"?
The Sealy Posturepedic Memory Foam Firm 11" and the Sealy Posturepedic Memory Foam Medium 12" are close enough in the lineup that most shoppers should compare them side by side. The biggest difference is feel: the Sealy Posturepedic Memory Foam Firm 11" lands on the firm side of the lineup, while the Sealy Posturepedic Memory Foam Medium 12" feels more medium.
Does it work with an adjustable base?
Yes, compatible with adjustable bases.
How fast can I get it delivered in Kentucky?
We deliver with our own team across Kentucky. Most orders arrive the next business day when the size is in stock. Pickup is available at our Lexington, Georgetown, Somerset, London, and Richmond locations.
What if I do not like it after a few nights?
You have 90 days to make sure the comfort is right. We usually recommend giving any new mattress at least 21 nights before making a comfort decision, because covers and foams need time to settle and your body needs time to adjust.
Can I try it before I buy?
Yes. We have these models represented across our Kentucky showrooms, so you can lie down on the feel before you buy. Walk in, take your time, and compare it against the nearby step-up and step-down models.
Still deciding?
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.
