Sealy
Sealy Posturepedic® Plus Plainfield 13" Ultra Firm Mattress
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Sealy Posturepedic Plus Plainfield Ultra Firm: cool, dry, and seriously supported
The Sealy Posturepedic Plus Plainfield in Ultra Firm is a 9 out of 10 build at 13 inches, set on the 966-coil PrecisionFit support system under a moisture-wicking MoistureProtect cover. This is the Posturepedic Plus tier: Sealy's targeted coil support and gel-foam comfort in a clean, no-nonsense build made to sleep cool, dry, and flat. If your back wants firm, level contact and you do not want to trade away cooling to get it, this is the Plainfield to lie on. And before you compare it anywhere else, know this: Sealy sells this same bed under three different names, so the smart move is to compare by UPC, not by model name. More on that below.
What you notice in the first few minutes
Lie down and the surface meets you firm and flat, with just enough gel foam on top to take the hard edge off. There is very little sink. At a 9 out of 10 the Plainfield Ultra Firm puts your back in clean contact with the coils instead of letting your hips settle in, which is exactly what a firm sleeper is after. The MoistureProtect cover reads cool and dry on first touch, and as the night goes on it keeps wicking moisture away, so the bed does not get clammy the way a standard cover can for a warm or restless sleeper. Move around and the pocketed coils answer point by point rather than passing the motion across to your partner.
PrecisionFit support, edge to edge
Sealy built its name on back support, and the Plainfield delivers it through 966 PrecisionFit pocketed coils that each move on their own, holding your spine point by point and firming up where you carry more weight. A DuraFlex reinforced coil edge carries that support out to the perimeter, so the usable surface runs nearly wall to wall and the bed holds its shape when you sit on the side or sleep right to the edge. Above the coils, SealyComfort and SealySupport gel foams contour the shoulders and hips and pull heat away from the surface. CertiPUR-US certified foams, a 10-year limited warranty, and adjustable-base compatibility round out the build, and at 13 inches, deep-pocket sheets (14 inches and up) sit best.
Who it suits, and who it does not
This one is built for back and stomach sleepers who want firm, level support, and for heavier sleepers, since the pocketed coils firm up under weight rather than bottoming out. Hot or restless sleepers benefit from the MoistureProtect cover, and couples get the whole mattress thanks to the DuraFlex edge. Be honest about position, though: if you sleep mainly on your side, a 9 out of 10 is likely too firm for the shoulder, and a medium or soft in the line will treat you better.
Same bed, three names: compare by UPC
Sealy gives this exact mattress a different model name at each national retailer, an old industry habit that makes price comparison hard on purpose. At Mattress Firm it is the Posturepedic Plus Norman II 13" Ultra Firm. At Sleep Outfitters and Mattress Warehouse it is the Posturepedic Plus Cranford Grove Ultra Firm. We call it the Plainfield. Same Sealy build, same law tag, same manufacturer UPC (748369694224 in Queen). The model name is marketing; the UPC is the truth. Compare it that way and decide for yourself who has the better deal.
How it compares inside the Sealy line
Plainfield sits in the Posturepedic Plus tier, a step above standard Posturepedic and alongside the Pro Indianapolis line. The honest difference: the Plainfield (Plus) brings the MoistureProtect cover and the 966-coil PrecisionFit system, while the Pro Indianapolis steps up to a 1,066-coil system with added reinforcement. They are close enough that the right call is to feel them side by side. Compare firmnesses and tight-top against Euro-top builds across the full Sealy lineup.
Lie on it in a Kentucky showroom this week
Targeted support and a cool, dry surface are things you feel lying down, not things you read off a label, which is the whole case for trying it in person. The Plainfield Ultra Firm is on the floor with the rest of the Sealy line across the five Kentucky showrooms in Lexington (Nicholasville Road), Richmond, Georgetown, London, and Somerset, no appointment needed. Select your size to see the live Mattress Overstock price. The 90-night trial holds when you buy from an authorized local dealer, delivery and setup are free and usually next business day when your size is in stock, and the old mattress leaves with the Mattress Overstock team. Because everyone on the floor is paid the same no matter which brand you choose, the guidance you get is honest. Bring ten real minutes and your sleep position; the bed will tell you the rest.
What makes this mattress different
966 PrecisionFit™ Coils
A pocketed-coil support system: each coil moves on its own for point-by-point support and motion isolation.
MoistureProtect™ Cover
A moisture-wicking cover with Surface-Guard™ Technology that keeps the surface cooler and drier than a standard cover.
SealyComfort™ & SealySupport™ Gel Foams
Gel-infused comfort and transition foams that contour to shoulders and hips while drawing heat away from the surface.
Ultra Firm Support
A 9 out of 10 build that puts your back in clean contact with the PrecisionFit coil support, with very little sink.
DuraFlex™ Reinforced Edge
A firmer perimeter so support runs nearly wall to wall, sit or sleep right to the edge.
Posturepedic Plus Tier
Sealy's targeted coil support and gel-foam comfort, a step above the standard Posturepedic.
Same Bed, Verified by UPC
Sold elsewhere as the Norman II and Cranford Grove; same Sealy build, same Queen UPC (748369694224). Compare by UPC, not by name.
Ultra Firm · 9 out of 10 · 90-Night Trial
Tuned to a 9 out of 10, backed by a 90-night trial and Sealy's 10-year limited warranty, honored when you buy from us.
Plainfield Ultra Firm, layer by layer
A cool, supported Posturepedic Plus coil build, from the surface down:
- MoistureProtect™ cover. A moisture-wicking knit with Surface-Guard™ Technology, designed to move surface heat and moisture away so the top sleeps cooler and drier than a standard cover.
- SealyComfort™ gel comfort foam. The contouring top layer that takes the hard edge off the firm surface and pulls heat away as you settle in.
- SealySupport™ gel transition foam. A firmer transition that carries you from the cushioned surface onto the coils without a sudden drop in feel.
- 966 PrecisionFit™ coil support system. Pocketed coils that move independently, supporting the spine point by point and firming up where you carry more weight, while keeping a partner's movement from carrying across the bed.
- DuraFlex™ reinforced coil edge. A firmer perimeter so the support runs nearly wall to wall and the bed holds its shape at the side.
13\", ultra firm (9 out of 10), CertiPUR-US® certified foams, a 10-year limited warranty, and adjustable-base compatible. (Architecture from the brand's spec; individual layer thicknesses are not all published.)
What's inside Sealy Posturepedic® Plus Hybrid
Sealy's hybrid build: a cooling cover over pressure-relief comfort foams, on a targeted pocketed-coil support core reinforced exactly where you need it.
For back and stomach sleepers who want firm, level support
Back sleepers: a strong fit. The 9 out of 10 surface over the PrecisionFit coils keeps the hips from dipping and holds the spine flat and supported.
Stomach sleepers: a strong fit. The flat, firm feel keeps the hips from sagging, which is what most stomach sleepers are chasing.
Heavier sleepers: a good fit. The pocketed coils firm up under weight and push back instead of bottoming out, with the DuraFlex edge holding the perimeter.
Hot or restless sleepers: a good fit. The MoistureProtect cover wicks moisture for a drier, cooler surface, and a coil core breathes better than an all-foam bed of the same feel.
Couples: a good fit. The independent coils help keep one partner's movement from crossing the bed, and the DuraFlex edge gives you the whole sleep surface.
Side sleepers: not the one. A 9 out of 10 is likely too firm for the shoulder and hip; choose a medium or soft in the Sealy line instead.
Specifications
| Height | 13" |
|---|---|
| Feel | Ultra Firm |
| Firmness | 9 out of 10 (10 = firmest) |
| Construction | MoistureProtect™ cover + SealyComfort & SealySupport gel foams + 966 PrecisionFit™ coil support system + DuraFlex™ reinforced coil edge |
| Cooling | MoistureProtect™ cover with Surface-Guard™ Technology helps move surface heat and moisture away as you sleep. |
| Motion isolation | Good – individually responsive PrecisionFit™ coils and gel comfort foams help keep partner movement in check |
| 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 Plainfield Ultra Firm?
About 9 out of 10, ultra firm. It is the firmest feel in the Plainfield line: a flat, reinforced surface built for sleeping more on top of the mattress than in it.
What is the PrecisionFit™ coil system?
A pocketed-coil support system of 966 coils that each move independently, supporting your spine point by point and firming up where you carry more weight, with motion isolation for couples.
What does the MoistureProtect™ cover do?
It wicks moisture away from the surface with Surface-Guard™ Technology, so the bed sleeps cooler and drier than a standard cover, a real benefit for warm or restless sleepers.
Is this the same bed as the Mattress Firm Norman II or the Sleep Outfitters Cranford Grove?
Yes. Sealy gives this exact mattress a different model name at each retailer: Mattress Firm sells it as the Posturepedic® Plus Norman II 13" Ultra Firm, while Sleep Outfitters and Mattress Warehouse sell it as the Posturepedic® Plus Cranford Grove Ultra Firm. Same Sealy build, same manufacturer UPC (748369694224 in Queen). Compare by UPC, not by model name.
How is Plainfield (Plus) different from the Pro Indianapolis?
Both are mid-tier Sealy beds; the Plainfield (Posturepedic Plus) features the MoistureProtect cover and the 966-coil PrecisionFit system, while the Pro Indianapolis steps up to a 1,066-coil system with added reinforcement. Feel them side by side.
Does it sleep hot?
The MoistureProtect cover and gel-infused foams over a coil core keep it cool and dry, cooler than an all-foam bed of the same feel.
How tall is it, and will my sheets fit?
13\". Deep-pocket sheets (14″ and up) sit best.
Do I need a special foundation?
No. A sturdy platform, close-slatted base, solid foundation, or compatible adjustable base all work with this build.
What's the trial and warranty?
A 90-night trial and Sealy's 10-year limited warranty, honored when you buy from us as an authorized dealer.
Can I see it near me?
Yes, on the floor across our five Kentucky showrooms (Lexington on Nicholasville Road, Georgetown, Somerset, London, Richmond), with the rest of the Sealy line. Free local delivery, and the old mattress is hauled away.
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.
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.
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.
