Beautyrest
Beautyrest Black® Hybrid CX-Class 13.5" Medium Mattress
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The honest verdict: the Black Hybrid CX-Class is the Beautyrest Black for the medium-feel sleeper who runs warm and hates feeling stuck. At a true medium, about 5 out of 10, on a 13.5-inch profile, it layers BlackICE plant-based cooling and a half-inch of Self-Response Latex over a zoned pocketed-coil hybrid core. The latex pushes back instead of swallowing you, the coils hold your spine honest, and the cooling works on the part of the bed your skin actually touches. If you want premium Black comfort without the tall, deeply quilted pillow-top of the numbered Series, start here.
What it's made of, and what that does for you
- BlackICE plant-based cooling, up top. A surface cooling system built to move heat off the sleep surface instead of letting it pool against your back, in a more sustainable, plant-based build.
- A natural-fiber comfort layer. Alpaca, cashmere, and silk fibers give the first inch a soft, breathable hand before you reach the firmer support below.
- Self-Response Latex. A half-inch of responsive, buoyant latex gives pressure relief foam alone can't match: it lifts you back instead of holding you down, so you turn over without fighting the bed.
- AirCool and high-density memory foams. Curated foams above the coils soften the entry and relieve pressure at the hips and shoulders, so the support layer never feels sharp.
- A zoned pocketed-coil hybrid core. Individually wrapped coils carry the real support, firmer where your midsection needs it, and isolate a partner's movement so their turning barely crosses the bed.
- A reinforced, foam-encased edge. The perimeter is built up so you can sit on the side or sleep edge to edge without the roll-off feeling, and the usable sleep surface stays larger.
- A true medium, 13.5 inches, 10-year warranty. The most universal feel in a tidy, lower profile that is easy to dress and friendly to most frames and bases.
What you notice the first night
Lie down and the Self-Response Latex gives a clean, buoyant push back rather than a slow sink, so you settle in without feeling swallowed. That responsiveness is what lets you move, turn, and reposition freely, the opposite of a deep memory-foam hug. Underneath, the zoned pocketed coils support your hips and shoulders while the natural-fiber and foam layers take the initial edge off, so the coils never read as hard. The cooling is the part you confirm by lying still: BlackICE plant-based cooling at the surface, working with the breathing coil core, pulls heat away instead of trapping it against you.
Who it's not for, said straight
- If you want plush or firm specifically. This is a true medium. The plush and firm builds in the Beautyrest Black lineup bracket it on either side.
- If you want a tall, deeply cushioned pillow-top. At 13.5 inches this is the leaner build. The numbered Series Three and Four stack deeper, taller comfort.
- If you want the memory-foam hug. This is a responsive latex-and-coil hybrid that lifts you up, not an enveloping foam bed that draws you in.
Living with it over the years
A true medium over a coil hybrid suits the widest range of sleepers, which is why back and combination sleepers tend to land here: enough give for your shoulders and hips, enough support to keep your spine honest as you change positions. For couples, the individually wrapped coils move independently, so a partner turning over or climbing in late barely reaches your side. The pocketed-coil core carries the support over the long run, the foams are CertiPUR-US certified for content and emissions, and the CX-Class flexes on an adjustable base if you like to read or sleep with your head or feet raised.
Why buy it from Mattress Overstock
Independent and serving Kentucky since 2012, with five showrooms you can actually walk into: Lexington on Nicholasville Road, Georgetown, Somerset, London, and Richmond. A cooling claim and a latex-responsive medium are both things you should confirm by lying down, not by reading, so come spend ten honest minutes on the CX-Class in your real sleep position. No appointment needed, and the team can put it side by side with the Black Series so you feel the difference yourself. Shoppers rate the experience 4.7 stars across 535 Google reviews, and because everyone on the floor is paid the same no matter which brand you choose, the guidance is honest.
You get a 100-day comfort guarantee. If the feel isn't right, you exchange it for store credit toward any bed of equal or greater value, no cash refund, but no restocking-fee games either. Free local delivery, free setup, and old-mattress haul-away across the Kentucky service area. Lie on the CX-Class in Lexington this week, or compare it first with the Series One Medium and the rest of the Beautyrest Black lineup.
What makes this mattress different
BlackICE plant-based cooling
A surface cooling system built to move heat off the sleep surface instead of trapping it against your back, in a more sustainable, plant-based build.
Self-Response Latex
A half-inch of responsive, buoyant latex that pushes back gently and lifts you instead of just sinking, so you reposition without fighting the bed.
Natural-fiber comfort layer
Alpaca, cashmere, and silk fibers give the surface a soft, breathable hand before you reach the firmer support below.
AirCool and high-density memory foams
Curated foams above the coils soften the entry and relieve pressure at the hips and shoulders, so the support never feels sharp.
Zoned pocketed-coil hybrid core
Individually wrapped coils carry the real support and isolate a partner's movement, so their turning barely crosses the bed.
Reinforced foam-encased edge
A built-up perimeter lets you sit on the side or sleep edge to edge without the roll-off feeling, and makes the usable sleep surface larger.
True medium, 13.5 inches, 10-year warranty
The most universal feel in a tidy, lower profile that is easy to dress, friendly to most frames, and backed by a 10-year limited warranty.
Premium cooling and responsive latex, layer by layer
The Black Hybrid CX-Class is layered for two things at once: keep you cool at the surface, and keep you lifted and supported underneath. From the top down, the build works like this.
1. BlackICE plant-based cooling cover. The cool-sleeping surface leads with Beautyrest Black's plant-based BlackICE cooling, designed to move body heat off the sleep surface so you settle in cool.
2. Natural-fiber comfort layer. A comfort layer woven with alpaca, cashmere, and silk fibers gives the first inch a soft, breathable hand.
3. AirCool and high-density memory foams. Curated memory foams relieve pressure at the hips and shoulders and ease you onto the support below, so the transition never feels abrupt.
4. Self-Response Latex. A half-inch of buoyant latex adds the responsive lift that sets this bed apart from a foam-only feel: it pushes back so you move freely instead of sinking in place.
5. Zoned pocketed-coil hybrid core. The support comes from individually wrapped coils, zoned to firm up under your midsection, that flex point by point to hold your spine and keep one sleeper's motion off the other's side.
6. Reinforced foam-encased edge. A foam-encased perimeter firms up the edge so you can sit and sleep edge to edge, and it helps the whole bed hold its shape over years of use.
The result is a true medium, about 5 out of 10, on a 13.5-inch profile: latex lift and premium cooling over real coils, in a cleaner, lower-profile build than the tall numbered Series pillow-tops. For the Series ladder's take on a Black medium, see the Series One Medium, or the whole range 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 the medium sleeper who wants premium cooling and lift
Back sleepers. A true medium is the sweet spot: the latex and foam fill the curve of your lower back while the zoned coils keep your hips from sinking, so you wake up aligned.
Combination sleepers. The Self-Response Latex is responsive enough to turn on easily all night, so switching between back and side never means fighting the mattress.
Hot sleepers. BlackICE plant-based cooling and the breathing pocketed-coil core target heat at the surface and through the bed, a real reason to put this Black on your short list if you sleep warm.
Couples. Individually wrapped coils move independently, so a partner turning over or coming to bed late barely registers on your side, and the reinforced edge gives you the full width to spread out.
Average-weight side sleepers. A medium gives some shoulder and hip relief, though dedicated side sleepers who want a cradle may prefer a plush build in the lineup. Best confirmed by lying on your side for a few minutes.
Probably not for you if you want a plush or firm feel specifically, a tall and deeply cushioned pillow-top, or the sink-in memory-foam hug. This is a responsive, lifted medium, and it will not become a soft or a firm bed. Tell the floor what you want and they will point you to the right Black.
Specifications
| Height | 13.5" |
|---|---|
| Feel | Medium Hybrid |
| Firmness | 5 out of 10 (10 = firmest) |
| Construction | BlackICE plant-based cooling and a luxury comfort layer over Self-Response™ Latex and a pocketed-coil hybrid core: 13.5 inches, medium. |
| Cooling | BlackICE plant-based cooling technology and a breathing pocketed-coil core draw heat off the surface for a cooler sleep. |
| Motion isolation | Excellent: 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
What is BlackICE cooling?
BlackICE is Beautyrest Black's plant-based cooling system, built to draw heat off the sleep surface for a cooler night, paired here with a breathing pocketed-coil core. Cooling is something you confirm by lying still on the bed, so it's worth feeling in person before you decide.
How firm is the CX-Class?
It's a true medium, about 5 out of 10, with a half-inch of Self-Response Latex adding a responsive, buoyant lift on top of the support coils. That medium feel is comfortable for back, combination, and many side sleepers.
What's inside it, top to bottom?
From the surface down: a BlackICE plant-based cooling cover, a comfort layer with alpaca, cashmere, and silk fibers, AirCool and high-density memory foams, a half-inch of Self-Response Latex, a zoned pocketed-coil hybrid core, and a reinforced foam-encased edge. Cooling and lift up top, real coil support underneath.
How is it different from the Black Series mattresses?
The CX-Class is the cooling-and-latex Black on a leaner 13.5-inch profile. The numbered Series ladder (One through Four) builds up through taller, more deeply cushioned pillow-tops. Feel both in the showroom, and see the Series One Medium to compare.
Will it work with an adjustable base?
Yes. The CX-Class is a hybrid that flexes on an adjustable base, so you can raise your head to read or your feet to take pressure off your lower back. Ask the floor to pair it with a base in the showroom so you can feel the positions.
Is it good for couples and motion?
It's a strong choice. The individually wrapped coils move independently, so one partner turning over or getting in late barely crosses to the other side, and the reinforced edge gives you both the full width of the bed.
How thick is it, and will my sheets fit?
It's a 13.5-inch profile, a tidy, lower-profile build that most standard deep-pocket fitted sheets handle comfortably. It's worth measuring 13.5 inches against your frame and headboard before delivery.
Does it off-gas, and is it certified?
The foams are CertiPUR-US certified, an independent program that tests for content, emissions, and durability. Any light new-mattress scent typically airs out within a day or two of setup.
How do delivery and the comfort guarantee work?
We deliver across Kentucky with our own team, usually next business day when your size is in stock, with free setup and old-mattress haul-away. You also get a 100-day comfort guarantee: if the feel isn't right, exchange it for store credit toward any bed of equal or greater value (no cash refund).
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. Come lie on this exact mattress in your own sleeping position before you decide. Shoppers rate us 4.7 stars across 535 Google reviews, and because everyone on the floor is paid the same no matter which brand you choose, the guidance you get 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.
