Beautyrest
Beautyrest Black® Series Two 14.25" Firm Mattress
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The honest verdict: the Series Two Firm is firm support with the Series Two cooling layered in. At about a 7 out of 10 it keeps your hips lifted and your spine level the way back and stomach sleepers need, but it sleeps cooler than the Series One firm options thanks to a Micro Diamond™ cooling layer and a gel-quilted surface. If you want a genuinely firm Beautyrest Black that doesn't feel hard or hot, this is the one to lie on first.
What you notice in the first few minutes
Lie down and the first thing you feel is that you are on top of the bed, not sinking into it. The quilted Sleep Climate™ surface has SurfaceTouch™ Gel Memory Foam worked into it, so there is a thin layer of give before the firm support takes over, not a hard panel. Under that, the firm-tuned Triple-Stranded Pocketed Coil® core pushes back and holds your hips up so your spine settles level. That is the Series Two firm feel.
What it's made of, and what that does for you
- A firm 7/10 feel. Supportive and on-top (hips lifted, spine level) without the hardness of an extra-firm bed.
- Micro Diamond™ Memory Foam cooling. The Series Two upgrade: memory foam infused with heat-conducting diamond particles that pull warmth away from the body. On a firm surface that sits you close to the materials, that is exactly where you feel cooling.
- SurfaceTouch™ Gel Memory Foam, quilted in. Gel foam worked into the surface for a little immediate pressure relief, so firm doesn't read as flat.
- Triple-Stranded Pocketed Coil® core. Coils braided from three steel strands and wrapped individually, tuned firm for support, with Black's signature motion separation.
- BeautyEdge® encasement. A reinforced perimeter so the edge holds when you sit or sleep near it.
- A 14.25-inch build, 10-year warranty. Substantial for a firm bed, on CertiPUR-US certified foams. Measure the height against your frame and buy deep-pocket sheets.
Who it suits, and who it doesn't
This is a back and stomach sleeper's firm bed. On your back, the firm coil support keeps the spine level with cooling to spare. On your stomach, the firm feel keeps your hips from sagging and your lower back from arching, the position a too-soft bed punishes most. And if you like firm but have slept hot on firm beds before, the Micro Diamond™ layer is aimed squarely at you.
- Side sleepers. A 7/10 firm will press on your shoulder and hip; a medium or plush Black is the better fit.
- If you want a smooth, contouring top. The Series Two Firm Hybrid gives the same Series Two cooling on a hybrid build instead of a quilted one.
- If you want the most accessible firm Black. The Series One Firm Pillow Top delivers firm support at the entry tier.
Living with it over time
The pocketed coils carry a quiet advantage night after night. Because each coil moves independently, a partner shifting or climbing in late barely crosses the bed, so motion separation stays strong even in a firm build. It is also compatible with an adjustable base, so you can pair the firm support with head-and-foot positioning if you read, watch, or like your legs raised.
Why buy it from Mattress Overstock
Whether a firm bed sleeps cool and supportive, or just hard, is something you settle lying down, not from a picture on a screen. Mattress Overstock has been locally owned and serving Kentucky since 2012, rated about 4.7 stars across 535 Google reviews, with five showrooms you can walk into with no appointment: Lexington (on Nicholasville Road), Georgetown, Somerset, London, and Richmond. Come feel the Series Two Firm beside the Series One firm models so you can feel exactly what the Micro Diamond™ cooling adds. Select your size to see the live Mattress Overstock price.
You get a 100-day comfort guarantee; if it's not right, you exchange it for store credit toward any bed of equal or greater value (pay the difference). No cash refund, but no restocking-fee games either. Free local delivery, free setup, and old-mattress haul-away. And no one on the Mattress Overstock floor earns more for steering you up a tier, so the guidance is honest whichever brand you choose. Compare the firm options across tiers in the full Beautyrest Black lineup.
What makes this mattress different
Firm 7/10 support that keeps you on top
A genuinely firm feel, around a 7 out of 10, that lifts the hips and levels the spine the way back and stomach sleepers need, without the hardness of an extra-firm bed.
Triple-Stranded Pocketed Coil® core
Individually-wrapped coils, each braided from three steel strands, tuned firm so support stays put while a partner's movement barely crosses the bed.
Micro Diamond™ Memory Foam cooling
The Series Two cooling upgrade: memory foam infused with heat-conducting diamond particles that pull warmth away from the body, the difference you feel against a firm surface that sits you close to the materials.
SurfaceTouch™ Gel Memory Foam, quilted in
Gel memory foam quilted directly into the Sleep Climate™ surface, so light pressure relief greets you the moment you lie down instead of a flat, hard panel.
BeautyEdge® encasement edge support
A reinforced perimeter, so you can sit on the side to dress or sleep right to the edge without the feeling you might roll off.
14.25-inch quilted build
Substantial for a firm bed, with a measured comfort layer over the support core. Measure the height against your frame and buy deep-pocket sheets to fit.
Adjustable-base compatible, 10-year warranty
Pair the firm support with head-and-foot positioning if you read or raise your legs, all on a premium Black build with CertiPUR-US certified foams.
Firm support, with the Series Two cooling layered in
Start at the surface. A quilted Sleep Climate™ top has SurfaceTouch™ Gel Memory Foam worked right into it, so the first thing you feel is a thin layer of give, not a hard panel. Just beneath sits the Series Two signature: Micro Diamond™ Memory Foam, memory foam infused with heat-conducting diamond particles that draw warmth away from the body. That layer is the real reason a Series Two firm sleeps cooler than a Series One firm, and it matters most here, because a firm surface sits you closer to the materials than a plush one does.
Under the comfort layers, a firm-tuned Triple-Stranded Pocketed Coil® core does the heavy lifting. Each coil is braided from three steel strands and wrapped on its own, so it answers your body point by point: hips lifted, spine level, and a partner's movement absorbed before it reaches your side. A BeautyEdge® encasement firms up the perimeter so the edge holds when you sit or sleep near it.
This is the quilted-surface Series Two firm. If you want the same Series Two cooling with a smooth, contouring top instead of a quilted one, lie on the Series Two Firm Hybrid beside it. For firm support at the entry tier, the Series One Firm Pillow Top is the value pick. See every option in the Beautyrest Black lineup.
Shop the Beautyrest Black lineup →What's inside Beautyrest Black
Five layers, engineered together: a cool quilted surface, pressure-relieving gel foam, and the Triple-Stranded Pocketed Coil® core that defines the Black line.
For back and stomach sleepers who run warm
Back sleepers: the firm coil core keeps the spine level and the hips from dipping, with enough cooling in the top layers to stay comfortable all night.
Stomach sleepers: the firm feel keeps the hips from sagging and the lower back from arching, the position a too-soft bed punishes most.
Warm sleepers who like it firm: if you want firm support but have slept hot on firm beds before, the Micro Diamond™ cooling layer is aimed squarely at you.
Couples: the Triple-Stranded Pocketed Coil® core absorbs motion, so someone shifting or getting in late barely crosses to your side.
Adjustable-base sleepers: it flexes on a powered base, so you can keep the firm support and still raise your head or legs to read, watch, or take pressure off your lower back.
Probably not for you if: you sleep on your side (a 7/10 firm presses on the shoulder and hip; a medium or plush Black fits better), or you want the softest, most cradling Black (look up-tier or to a plush feel).
Specifications
| Height | 14.25" |
|---|---|
| Feel | Firm |
| Firmness | 7 out of 10 (10 = firmest) |
| Construction | Sleep Climate™ quilting over a measured Beautyrest® Gel Memory Foam comfort layer and a firm-tuned Triple-Stranded Pocketed Coil® core: 14.25 inches, firm. |
| Cooling | Series Two enhanced cooling: Sleep Climate™ quilting and Beautyrest® Gel Memory Foam over a Triple-Stranded Pocketed Coil core that breathes more than all-foam. |
| Motion isolation | Excellent. Triple-Stranded Pocketed Coils move independently, so a partner's movement barely crosses the bed. |
| Adjustable base | Yes, compatible with adjustable bases |
| Certifications | CertiPUR-US certified foams |
| Warranty | 10-year limited warranty |
| Trial period | 100 days at Mattress Overstock |
Frequently asked questions
How firm is the Series Two Firm?
About a 7 out of 10: genuinely firm and supportive, keeping you on top of the bed rather than sinking in, but not the absolute hardest. The Series Two cooling and comfort upgrades keep that firmness from feeling harsh.
What does Series Two add over Series One on a firm bed?
Mainly cooling. Series Two adds Micro Diamond™ Memory Foam, memory foam infused with heat-conducting diamond particles that pull warmth away from the body, plus SurfaceTouch™ Gel Memory Foam quilted into the surface for a touch more give. A firm bed sits you closer to the materials, so that extra cooling is exactly where you feel it. For firm at the entry tier, see the Series One Firm Pillow Top.
What is Micro Diamond™ Memory Foam?
It is a Series Two cooling layer: memory foam infused with heat-conducting diamond particles designed to move heat away from the body as you sleep. On a firm surface, where you rest closer to the materials, that cooling is more noticeable than it would be under a thick plush top.
Is this a hybrid or an innerspring?
This is the quilted-surface Series Two firm: gel and Micro Diamond™ memory-foam comfort layers over a Triple-Stranded Pocketed Coil® support core. Beautyrest classes its smooth, contouring-top Black models as hybrids and its quilted-top models like this one as quilted innerspring. If you want the same Series Two cooling with a smooth contouring top, lie on the Series Two Firm Hybrid instead.
How is the edge support?
A BeautyEdge® encasement reinforces the perimeter, so you can sit on the side to dress or sleep close to the edge without the sense you might roll off. It also makes the full surface usable, which matters most on smaller sizes and for couples.
Can I use it on an adjustable base?
Yes. It is built to flex on a powered adjustable base, so you can keep the firm support and still raise your head or feet to read, watch, or take pressure off your lower back. Ask the floor which base pairs best with it.
Is it good for back pain?
Firm, supportive beds suit many back and stomach sleepers by keeping the spine level, but the right firmness is personal. We always recommend lying on it in your own sleeping position; comfort is individual, and we won't claim a mattress is a medical fix.
How much motion will I feel from my partner?
Very little. Each Triple-Stranded Pocketed Coil® is wrapped on its own, so it responds to one body without dragging the surface with it. A partner turning over or climbing in late barely reaches your side, even on a firm build.
How tall is it, and will my sheets fit?
It stands 14.25 inches, substantial for a firm bed. Measure that against your frame and foundation, and buy deep-pocket sheets so they fit the height without popping off the corners.
Can I see this mattress in person near me?
Yes, and with a mattress, we'd 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, rated about 4.7 stars across 535 Google reviews. Come lie on this exact mattress in your own sleeping position, beside the Series One firm models, so you can feel what the cooling step-up adds. Delivery is free across our Kentucky service area with old-mattress haul-away, and because everyone on the floor is paid the same no matter which brand you choose, the guidance is honest.
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.
