Beautyrest
Beautyrest Black® Hybrid Series Four XCS 14.75" Firm Mattress
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Beautyrest Black Series Four XCS Firm: firm spine, softer handshake
The Series Four XCS in Firm is where Beautyrest Black adds a second suspension: a layer of 2K Micro Coils riding on top of the Triple-Stranded Pocketed Coil core. The result reads firm to your spine and friendlier to your skin, surface contour a slab of firm foam cannot fake, over support that does not budge. At 14.75 inches with an 8 out of 10 feel, this is the firm bed for sleepers who found entry-level firm a little blunt.
The cooling is the headline
XCS is Beautyrest's coolest Black hybrid line, and it leads with temperature. A cool-to-the-touch Sleep Climate surface sits over Micro Diamond Memory Foam infused with BlackICE Max, Beautyrest's most aggressive cooling system, which boosts cooling power by 30 percent and pulls body heat away so you sleep cooler, longer. This is the highest cooling tier in the Beautyrest Black Hybrid lineup. No mattress is air conditioning, but if you love a deep, contouring bed and have always woken up hot, this is real, testable engineering against heat rather than a word printed on a label.
Support, layer by layer
Under the cooling comfort foams, the Series Four XCS rides on 2K Micro Coils over the Triple-Stranded Pocketed Coil core, each coil wrapped to move on its own for point-by-point support and motion isolation. Above the coils, the ContourCover comfort system layers FORM HD and FORM HD Max material, with GelFeel Firm HD and TotalEmbrace XHD memory foams carrying the firm feel through the build. The 2K Micro Coils are the step that separates Series Four from Series Three: a finer layer of individually responsive support that contours in more detail than the main coil unit alone, so your shoulders and hips get two thousand small opinions about exactly where pressure should go. That same hybrid core reinforces the perimeter for dependable edge support, so two people get the full width of the bed without rolling off. The foams are CertiPUR-US certified, it works with a sturdy platform, a solid foundation, or a compatible adjustable base, and it carries a 10-year limited warranty.
Tuned to firm, and who it fits
This is the Firm, an 8 out of 10: supported, not hard. Lie down and the cooling foams give under your shoulders and hips and relieve pressure while the coils hold you on top of the bed rather than letting you sink in. That suits back sleepers, who get level support with flagship cooling, and stomach sleepers, whose hips stay from sagging. Heavier sleepers are served too, since the Triple-Stranded coil paired with the micro-coils supports weight without bottoming out. The honest caution is side sleeping: at an 8 out of 10 this is likely too firm if you sleep mostly on your side and want give at the shoulder. If that is you, ask the Mattress Overstock team about the Series Four Medium, the same coil-on-coil build and cooling in a softer feel.
Where it sits in the line
If you want firm, this is the ceiling. The XCS line offers a firm feel in exactly two beds, the Series Three Firm and this one. Series Three does planted firm with one coil layer; Series Five steps up to 4K Micro Coils as the flagship but comes in plush only. So nothing above this tier comes in firm at all: Series Four Firm is the top of the firm Black hybrid line, with the added 2K micro-coil contour Series Three does not have. Compare it across the full Beautyrest collection, and if you are cross-shopping the other premium hybrids, read the honest Stearns & Foster vs Beautyrest Black comparison first.
Ten minutes beats ten reviews
Cooling and deep contour are feels you confirm lying down, not from a spec sheet. The Series Four XCS Firm is on the floor across five Mattress Overstock showrooms (Lexington on Nicholasville Road, Richmond, Georgetown, London, and Somerset), no appointment needed. The 100-night trial and the brand's warranty are honored when you buy from Mattress Overstock, an authorized dealer and an independent Kentucky retailer since 2012. Because everyone on the floor is paid the same no matter which brand you choose, the guidance is honest and never pushed toward one bed. Free local delivery, setup, and old-mattress haul-away come with it. Select your size to see the live price, then come lie down on it.
What makes this mattress different
Firm Spine, Softer Handshake
A layer of 2K Micro Coils over the Triple-Stranded core: support that does not budge, with surface contour a slab of firm foam cannot fake.
BlackICE Max Cooling
Beautyrest's most aggressive cooling. A cool-to-the-touch Sleep Climate surface over Micro Diamond Memory Foam, built to pull heat away by 30 percent all night.
Triple-Stranded Pocketed Coil
Each coil is wrapped and twisted from three strands of steel: point-by-point support with strong motion isolation.
2K Micro Coils
The step that separates Series Four from Series Three. A finer layer of individually responsive coils for more detailed contour than the main unit alone.
Firm Feel, 8 out of 10
Tuned to an 8 out of 10 for back and stomach sleepers who want firm support that still relieves pressure at the shoulders and hips.
Top of the Firm Line
The XCS line offers Firm only here and in Series Three. Series Five comes plush only, so this is the firmest contour-loaded Black hybrid you can buy.
ContourCover Comfort System
FORM HD and FORM HD Max material with GelFeel Firm HD and TotalEmbrace XHD foams, conforming closely while holding the firm feel.
100-Night Trial, Honored Here
Sleep on it for 100 nights, the same trial Beautyrest offers, backed by the 10-year warranty and honored when you buy from an authorized dealer.
Series Four XCS Firm, layer by layer
The Series Four XCS stacks a cooling comfort system over two layers of suspension, the detail that separates it from Series Three:
- Sleep Climate surface. A cool-to-the-touch cover for that first cool contact.
- Micro Diamond Memory Foam + BlackICE Max. The cooling, pressure-relieving comfort layer, Beautyrest's most aggressive cooling system.
- ContourCover: FORM HD + FORM HD Max material. Close-conforming flagship comfort.
- GelFeel Firm HD + TotalEmbrace XHD memory foams. The foams that carry the firm feel through the build.
- 2K Micro Coils. A finer responsive contour layer, the upgrade over Series Three.
- Triple-Stranded Pocketed Coil core. Point-by-point support, motion isolation, and a reinforced perimeter for edge support.
14.75 inches, firm (8 out of 10), CertiPUR-US certified foams, a 10-year limited warranty, and the 100-night trial. (Architecture from the brand's spec; individual layer thicknesses are not all published.)
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 back and stomach sleepers who run warm
Back sleepers. Firm, level support that keeps the spine aligned, with the coolest cover in the Black line.
Stomach sleepers. The firm coil-on-coil build keeps the hips from sagging, the usual stomach-sleeper failure point.
Hot sleepers who want firm. XCS is the coolest Black hybrid, and firm beds that also sleep cold are rarer than they should be.
Heavier sleepers. The Triple-Stranded coil plus the 2K micro-coils supports weight without bottoming out.
Couples. Wrapped coils isolate motion so a partner's movement barely crosses the bed, and the reinforced edge holds the full width.
Side sleepers, an honest no. At an 8 out of 10 this is likely too firm for the shoulder; choose the Series Four Medium or Series Five Plush XCS instead for the same cooling in a softer feel.
Specifications
| Height | 14.75" |
|---|---|
| Feel | Firm Hybrid |
| Firmness | 8 out of 10 (10 = firmest) |
| Construction | Cool-to-the-touch Sleep Climate Surface + ContourCover (FORM HD + FORM HD Max Material) + GelFeel Firm HD Memory Foam + TotalEmbrace XHD Memory Foam + 2K Micro Coils + Triple-Stranded Pocketed Coil Technology |
| Cooling | BlackICE Max Cooling Technology boosts cooling power by 30%, moving body heat away so you sleep cooler, longer. It is topped by a cool-to-the-touch Sleep Climate Surface for immediate surface cooling. This XCS-exclusive system is the highest cooling tier in the Beautyrest Black Hybrid lineup. |
| Motion isolation | Triple-Stranded Pocketed Coil Technology working with 2K Micro Coils conforms instantly to isolate movement between sleepers and support each body's shape, so partners rest undisturbed. The hybrid coil-on-coil support core also reinforces the perimeter for dependable edge support, while the firm specialty-foam build keeps the surface stable for back and stomach sleepers. |
| Adjustable base | Yes, compatible with adjustable bases; ContourCover enables optional split-head sizing 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 Four XCS Firm?
About 8 out of 10, firm but not hard. The cooling comfort foams still give under your shoulders and hips and relieve pressure, while the coils hold you on top of the bed.
What makes XCS different from the core Beautyrest Black?
XCS is Beautyrest's coolest, most contouring Black hybrid line. It leads with BlackICE Max cooling and a layered micro-coil and Triple-Stranded coil system. If cooling is your priority alongside flagship pressure relief, XCS is the line to feel.
Does it really sleep cool?
Cooling is the XCS headline: a cool-to-the-touch Sleep Climate surface over Micro Diamond Memory Foam with BlackICE Max, which boosts cooling power by 30 percent. No mattress is air conditioning, but this is real, testable engineering against heat.
How is Series Four different from the other XCS series?
Series Four adds a layer of 2K Micro Coils over the Triple-Stranded coil for more detailed contour than Series Three. Series Five steps up to 4K Micro Coils as the flagship plush.
Is this the firmest Beautyrest Black XCS I can get?
Yes. The XCS line offers a firm feel in only two beds, the Series Three Firm and this Series Four Firm. Series Five comes in plush only, so Series Four Firm is the top of the firm Black hybrid line with the added 2K micro-coil contour.
What are the Triple-Stranded Pocketed Coils?
Beautyrest's signature support. Each coil is wrapped in its own pocket and twisted from three strands of steel, so the bed supports point by point and a partner's movement barely crosses it.
How tall is it, and will my sheets fit?
14.75 inches. Deep-pocket sheets rated for 15 inches and up sit best.
Do I need a special foundation?
No. A sturdy platform, a close-slatted base, a solid foundation, or a compatible adjustable base all work.
What is the trial and warranty?
A 100-night trial, the same trial Beautyrest offers, and a 10-year limited manufacturing warranty, honored when you buy from Mattress Overstock as an authorized dealer.
Can I see it near me?
Yes. It is on the floor across our five Kentucky showrooms (Lexington on Nicholasville Road, Georgetown, Somerset, London, and Richmond), alongside the rest of the Beautyrest Black line. Free local delivery, and the old mattress 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.
