Beautyrest
Beautyrest Black® Hybrid Series Three XCS 14.5" Medium Mattress
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Beautyrest Black Hybrid Series Three XCS Medium: the cool-sleeping medium most people are shopping for
The honest verdict: the Series Three XCS Medium is for the warm sleeper who wants a flagship, deeply contouring hybrid and a balanced 5-out-of-10 feel. It is the cooling-focused base of the Beautyrest Black XCS line, the coolest Black hybrid Beautyrest makes, built at 14.5 inches around BlackICE Max and the Triple-Stranded Pocketed Coil core. If you love a bed that cradles pressure but always wake up hot, this is the Black to lie on first.
The cooling is the headline
XCS leads with temperature, and the engineering is specific. BlackICE Max sits on the first memory foam layer, the one your body rests against, where heat builds first on a contouring bed. Beautyrest rates it at 30 percent more cooling power, built to move heat away up to twice as long, under a cool-to-the-touch Sleep Climate Surface. No mattress is air conditioning, but this is what lets a hot sleeper keep a deep memory-foam feel instead of trading it for a firmer, cooler bed.
Support and feel, layer by layer
Beneath the cooling comfort layers, the Series Three XCS rides on the Triple-Stranded Pocketed Coil core. The name is literal: each coil is twisted from three strands of steel and sealed in its own pocket, so it answers your weight where you press and stays quiet where you do not. That is the part couples feel first, because a partner moving across the bed barely reaches your side. Above the coils, a ContourCover comfort system carries FORM HD Material and TotalEmbrace XHD Memory Foam to cradle pressure points, with Dynamic Response Memory Foam adding give without the stuck-in, slow-to-turn sensation that puts many people off deep memory foam.
Why medium, and who should skip it
This is the Medium, a 5 out of 10. A true medium is the most universal feel: supportive for backs, giving enough for most shoulders, and easy for combination sleepers to turn on. If your household has one of each, it is usually the feel that disappoints no one, the pick when you are unsure or buying for two different bodies. Be honest with yourself on the edges, though. If you sleep cold and like trapping warmth, the cooling is wasted on you. If you want a firm, on-top-of-the-bed stance, look at the Series Three XCS Firm; to sink in, the Series Three XCS Plush is the soft end of the same tier.
Living with it
Lie near the edge and the hybrid coil unit reinforces the perimeter, so you get usable surface to the sides instead of a roll-off feeling. At 14.5 inches this is a tall bed, so deep-pocket sheets (15 inches or more) fit best. It works on a sturdy platform, a close-slatted base, a solid foundation, or a compatible adjustable base. One XCS-only detail: the ContourCover cover enables split-head sizing (Split Head Queen, Split Head King), so each side of a split-head adjustable base articulates on its own, something the standard Beautyrest Black Hybrid cannot do.
Where it sits in the line
The XCS ladder runs from Series Three (cooling plus the Triple-Stranded coil) up through Series Four (which adds a 2K micro-coil layer for finer surface contour at 15 inches) to Series Five (4K micro coils, the flagship). Series Three carries the full BlackICE Max story and the signature coil without those extra micro-coil layers. Coming off an older innerspring that sleeps hot, the jump in cooling and motion separation is the part you feel first. Compare it against the rest of the wall in the full Beautyrest collection.
Ten minutes beats ten reviews
Cooling and deep contour are feels you confirm lying down, not reading specs. The Series Three XCS Medium is on the floor across the five Mattress Overstock showrooms in Kentucky (Lexington on Nicholasville Road, Richmond, Georgetown, London, and Somerset), no appointment needed, beside the rest of the Beautyrest Black line so you can feel the firm, medium, and plush back to back. Because every Mattress Overstock associate is paid the same no matter which brand you choose, the floor guidance is about fit, not a push toward one bed. The 100-night trial holds when you buy from a local authorized dealer; delivery, setup, and old-mattress haul-away are free across the Kentucky service area; and in-stock sizes usually arrive the next business day. Lie on it in Lexington this week, then select your size to see the live Mattress Overstock price.
What makes this mattress different
BlackICE Max Cooling
Beautyrest's most aggressive cooling, applied to the first memory foam layer for 30 percent more cooling power and heat moved away up to twice as long, under a cool-to-the-touch Sleep Climate Surface.
Triple-Stranded Pocketed Coil core
Each coil is twisted from three strands of steel and wrapped in its own pocket: point-by-point support where you press and strong motion isolation so a partner's movement stays on their side.
Medium feel, 5 out of 10
Tuned to a balanced medium, the do-everything feel for back, side, and combination sleepers and the safe pick when you are buying for two different bodies.
ContourCover comfort system
FORM HD Material and TotalEmbrace XHD Memory Foam conform closely for flagship pressure relief, with Dynamic Response Memory Foam adding responsive give.
Split-head sizing capable
The ContourCover cover enables Split Head Queen and Split Head King so each side raises and lowers independently on a split-head adjustable base, an XCS feature the standard Black Hybrid lacks.
Reinforced edge and 14.5-inch build
The hybrid coil unit firms the perimeter for usable sleeping surface to the edge; the tall 14.5-inch profile pairs best with deep-pocket sheets.
CertiPUR-US certified foams
The comfort foams are CertiPUR-US certified, made without ozone depleters, mercury, or formaldehyde, and low in VOC emissions.
100-night trial and 10-year warranty
Sleep on it for 100 nights and rest on a 10-year limited warranty, both honored when you buy from an authorized dealer.
Series Three XCS Medium, layer by layer
The Series Three XCS stacks cooling comfort foams over a responsive coil system, tuned to a medium feel:
- Sleep Climate Surface. A cool-to-the-touch cover that keeps the surface cooler from first contact.
- ContourCover with FORM HD Material. A close-conforming comfort layer for flagship pressure relief; the zippered ContourCover design is what enables split-head sizing.
- TotalEmbrace XHD Memory Foam. Cradles pressure points at the shoulders and hips without compromising support.
- Micro Diamond Memory Foam with BlackICE Max. The cooling, pressure-relieving heart of the bed, carrying the cooling tech on the first foam layer your body touches.
- Dynamic Response Memory Foam. Adds responsive give so you do not feel stuck or slow to turn.
- Triple-Stranded Pocketed Coil core. The 14.5-inch hybrid support system: point-by-point support, motion isolation, and a reinforced edge.
14.5 inches tall, a balanced medium (5 out of 10), backed by the 100-night trial and a 10-year limited warranty. Architecture is from Beautyrest's published spec; Beautyrest does not publish individual layer thicknesses or a coil count for this tier, so neither is stated here.
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.
Best for hot sleepers and couples who want a balanced medium
Hot sleepers who want deep contour: this is the headline fit. BlackICE Max is the coolest Black hybrid system, so you can keep a deep memory-foam feel without waking up overheated.
Couples and combination sleepers: the wrapped Triple-Stranded coils isolate motion so one partner's turning barely crosses the bed, and a true medium is the easiest feel to change positions on through the night.
Back sleepers: supported and held in alignment without feeling hard, with the comfort foams taking the edge off pressure points.
Side sleepers: enough give at the shoulder and hip for most bodies; if your shoulders are broad or you sleep strictly on your side, the softer Series Three XCS Plush may suit you better.
Split-head adjustable base owners: a strong fit, because the ContourCover cover offers Split Head Queen and Split Head King so each side articulates on its own.
Probably not for you if: you sleep cold and like trapping heat (the cooling is wasted), or you want a firm, on-top-of-the-bed stance. For that, feel the Series Three XCS Firm instead.
Specifications
| Height | 14.5" |
|---|---|
| Feel | Medium Hybrid |
| Firmness | 5 out of 10 (10 = firmest) |
| Construction | Sleep Climate Surface + ContourCover with FORM HD Material + TotalEmbrace XHD Memory Foam + Micro Diamond Memory Foam (BlackICE Max cooling layer) + Dynamic Response Memory Foam + Triple-Stranded Pocketed Coil support system (14.5 in hybrid) |
| Cooling | BlackICE Max Cooling Technology applied to the first memory foam layer delivers 30% more cooling power and moves body heat away up to 2X longer; a cool-to-the-touch Sleep Climate Surface tops the mattress to keep the surface cooler all night. Together these distinguish the XCS models from the standard Beautyrest Black Hybrid line. |
| Motion isolation | Excellent: Triple-Stranded Pocketed Coil Technology delivers Beautyrest's most advanced individualized support and motion separation, conforming to isolate movement so a partner rests undisturbed; the hybrid coil unit also reinforces edge stability, while FORM HD and TotalEmbrace XHD foams cradle pressure points without a stuck-in feel. |
| Adjustable base | Yes, compatible with adjustable bases, including Split Head Queen and Split Head King for split-head 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 Three XCS Medium?
About 5 out of 10, a balanced, universal medium. Beautyrest does not publish a numeric firmness scale for this model, so that figure reflects its medium positioning in the line rather than a quoted number.
What makes XCS different from the standard Beautyrest Black Hybrid?
XCS is Beautyrest's coolest, most contouring Black hybrid tier. It leads with BlackICE Max cooling (30 percent more cooling power than standard BlackICE) plus a cool-to-the-touch Sleep Climate Surface, and it adds a zippered ContourCover cover that enables split-head sizing. The standard Black Hybrid does not offer split-head sizes but does offer some upgrades, such as latex, that the XCS line leaves out.
Does it really sleep cool?
Cooling is the XCS headline. BlackICE Max sits on the first memory foam layer, where heat builds first on a contouring bed, and is rated at 30 percent more cooling power and built to move heat away up to twice as long, under a cool-to-the-touch surface. No mattress is air conditioning, but this is real, testable engineering against heat rather than a marketing word.
How is Series Three different from Series Four and Series Five XCS?
Series Three is the cooling-focused base XCS, built on the Triple-Stranded Pocketed Coil with no micro-coil layer. Series Four adds a layer of 2K Micro Coils for finer surface contour; Series Five adds 4K Micro Coils (two stacked layers) and is the flagship. All three share the same BlackICE Max cooling and cool-to-the-touch surface.
What are the Triple-Stranded Pocketed Coils?
They are Beautyrest's signature support system. Each coil is twisted from three strands of steel and wrapped in its own fabric pocket, so the bed supports you point by point and a partner's movement barely transfers across it.
Can I get it in a split-head size for an adjustable base?
Yes. The XCS ContourCover cover enables Split Head Queen and Split Head King. Paired with a split-head adjustable base, each person can raise or lower their own side, for reading or easing snoring, while still sharing one connected mattress. A split-head mattress needs a split-head adjustable base to use that feature.
How tall is it, and will my sheets fit?
It stands 14.5 inches tall. Deep-pocket sheets rated for 15 inches or more sit best and stay on the corners.
Do I need a special foundation?
No. A sturdy platform, a close-slatted base, a solid foundation, or a compatible adjustable base all work. Only the split-head sizes require a matching split-head adjustable base to articulate each side.
Does it contain fiberglass?
The Series Three XCS uses CertiPUR-US certified comfort foams. Beautyrest does not list fiberglass in this model's construction; its fire barrier and full materials are detailed on the law tag and in Beautyrest's product documentation. If a fiberglass-free build is essential to you, ask the floor team to confirm against the current spec before you buy.
What are the trial, warranty, and delivery terms?
You get a 100-night in-home trial and a 10-year limited warranty, both honored when you buy from an authorized dealer like Mattress Overstock. Delivery, setup, and old-mattress haul-away are free across the Kentucky service area, and in-stock sizes usually arrive the next business day. See it in person across the five Kentucky showrooms (Lexington on Nicholasville Road, Georgetown, Somerset, London, and Richmond).
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.
