Beautyrest
Beautyrest Black® Hybrid Series Four XCS 15" Medium Mattress
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Beautyrest Black® Hybrid Series Four XCS 15" Medium Mattress – Top-Tier Cooling Hybrid in Kentucky
Meet the new standard for luxury sleep at Mattress Overstock in Kentucky: the Beautyrest Black® Hybrid Series Four XCS 15" Medium Mattress. XCS is the most advanced tier in the Beautyrest Black hybrid family, and Series Four sits right in the heart of it — building on the base XCS platform with an added layer of 2K Micro Coils for a more cushioned, individually-contouring feel. Its balanced medium firmness (about a 5–6 on a 10-point scale) is the line's most universal feel: plush enough to relieve pressure at the shoulders and hips, supportive enough to keep your spine in line, and engineered around BlackICE™ Max cooling so hot sleepers finally stay cool through the night. This is the mattress for the shopper who wants flagship cooling without committing to the firm or plush extremes.
✨ Key Features of the Beautyrest Black® Hybrid Series Four XCS Medium Mattress
❄️ BlackICE™ Max Cooling Technology – 30% More Cooling Power
XCS is built around BlackICE™ Max, Beautyrest's most powerful cooling system, rated at 30% more cooling power than the prior generation. It actively pulls body heat away from the sleep surface so you fall asleep faster and stay cool longer — the strongest cooling package offered anywhere in the Beautyrest Black hybrid range.
☃️ Sleep Climate Surface & ContourCover
The cool-to-the-touch Sleep Climate Surface draws heat off the surface the moment you lie down, while the dynamically-designed ContourCover hugs your body and is engineered for optional split-head sizing — so the same mattress pairs with split-head adjustable bases (Split Head Queen / Split Head King), a configuration the lower Black hybrid tiers do not offer.
🪜 Triple-Stranded Pocketed Coil Technology
The support core uses triple-stranded individually-wrapped coils that flex independently to deliver targeted, body-following support and class-leading motion isolation. Pair that with a perimeter-reinforced coil unit and the 15" build holds a stable, sit-friendly edge.
🌀 2K Micro Coils – The Series Four Difference
This is what separates Series Four from the base Series Three: a dedicated layer of 2,000 micro coils sits above the main support unit, adding a second, finer level of individualized, instantly-responsive contouring under your pressure points. It is more cushion and quicker rebound than the entry XCS tier — and a step below the 4K micro coils and enhanced edge of Series Five.
🧊 Layered FORM HD, TotalEmbrace XHD & Dynamic Response Foams
FORM HD Material and FORM HD Max Material shape the medium feel, TotalEmbrace™ XHD Memory Foam wraps your shoulders and hips with deep pressure relief, and Dynamic Response Memory Foam keeps the surface lively and easy to move on instead of slow and sinking. All foams are CertiPUR-US certified.
💬 Who Is the Series Four XCS Medium Ideal For?
The Medium feel is the most broadly recommended firmness in the XCS line. Choose this model if you are:
- Combination sleepers: The balanced 5–6/10 medium feel works whether you rotate between side, back, and stomach — it is not committed to a single position the way the Firm or Plush versions are.
- Couples who can't agree: Medium is the easy compromise when one partner wants more give and the other wants more support, and the Triple-Stranded Pocketed Coils keep one person's movement from waking the other.
- Side and back sleepers: TotalEmbrace XHD foam plus the 2K micro coils cradle the shoulders and hips while the coil core keeps your lower back supported.
- Hot sleepers: BlackICE™ Max (+30%) and the Sleep Climate Surface make this the strongest cooling choice MO carries in the Beautyrest Black hybrid family.
- Adjustable-base owners: It flexes cleanly on adjustable and split-head bases for reading, TV, and zero-gravity positions.
⚖️ How XCS Compares – Why Step Up From LX-Class / Series Three
XCS sits above the prior LX-Class / CX-Class and the non-XCS Black Hybrid lines. The headline upgrade is cooling: BlackICE™ Max delivers 30% more cooling power paired with the cool-to-the-touch Sleep Climate Surface — a noticeably cooler surface than older Black hybrids. XCS also stacks a micro-coil layer on top of the Triple-Stranded Pocketed Coil unit for an extra level of individualized, instantly-contouring support, and its ContourCover is engineered for split-head sizing to match split-head adjustable bases. Within XCS, the base Series Three gives you the cooling and the coil core; this Series Four adds a 2K Micro Coil layer for more cushion and contour; Series Five goes further still with 4K micro coils and enhanced edge support. Series Four Medium is the line's sweet spot — flagship XCS cooling plus an added comfort layer, in the firmness most sleepers reach for first.
⚙️ Technical Specifications
| Specification | Details |
|---|---|
| Height | Approximately 15" |
| Firmness Level | Medium (rated about 5–6 out of 10, where 10 = firmest) |
| Feel | Medium Hybrid |
| Construction Type | Hybrid — Sleep Climate Surface + ContourCover + FORM HD & FORM HD Max Material + TotalEmbrace XHD Memory Foam + Dynamic Response Memory Foam + 2K Micro Coils over a Triple-Stranded Pocketed Coil support unit on a foam base |
| Key Technologies | BlackICE™ Max Cooling (+30%), Sleep Climate Surface, Triple-Stranded Pocketed Coil Technology, 2K Micro Coils, ContourCover (split-head capable) |
| Cooling | BlackICE™ Max Cooling Technology — 30% more cooling power than the prior generation, topped by a cool-to-the-touch Sleep Climate Surface |
| Motion Isolation | Excellent — Triple-Stranded Pocketed Coils flex independently so partner movement is not transferred across the bed |
| Available Sizes | Twin XL, Queen, Split Head Queen, King, Split Head King, Cal King |
| Adjustable Base Compatibility | Yes — compatible with standard and split-head adjustable bases |
| Certifications | CertiPUR-US certified foams |
| Warranty | 10-Year Limited Warranty (covers manufacturing defects; full details available from Beautyrest) |
🧺 Mattress Care
To get the longest life and best feel from your Series Four XCS Medium:
- Use a breathable, waterproof mattress protector to guard against spills and allergens without trapping heat or blocking the Sleep Climate Surface.
- Rotate head-to-foot every 3–6 months (especially in the first two years) for even wear. Do not flip — this is a one-sided build.
- Support it on a sturdy compatible foundation or adjustable base, with center support for Queen, King, and Cal King sizes.
- Spot clean stains with mild detergent and water; blot gently without soaking and let it air dry fully. Do not machine wash the cover.
- Vacuum the surface occasionally with an upholstery attachment to remove dust.
🏆 Why Choose Mattress Overstock in Kentucky?
- ✅ Fast Local Delivery: We deliver across Kentucky with our own team — often next-business-day when your size is in stock.
- ✅ Expert Sleep Advice: With over 100 years of combined experience, our team gives honest guidance on flagship lines like Beautyrest Black® XCS.
- ✅ In-Store Testing: Try it firsthand at our showrooms in Lexington (Nicholasville Road), Somerset, and Georgetown, and compare it against the Series Three and Series Five XCS models side by side.
- ✅ Competitive Pricing & Financing: Premium Beautyrest Black at great prices, with flexible financing options.
- ✅ 100-Night Comfort Guarantee: Take 100 days at home to be sure the comfort is right.
🛒 Shop the Beautyrest Black® Hybrid Series Four XCS Medium Today
Upgrade to the strongest cooling, individualized contouring, and balanced medium support in the Beautyrest Black line — backed by a 10-year warranty and our 100-night comfort guarantee, available now at Mattress Overstock.
Browse the Full Beautyrest® Collection | View All Hybrid Mattresses in Kentucky
Ready to find your perfect cooling hybrid? Visit Mattress Overstock online or in-store. For help:
Call our experts: 859-710-9265 (Lexington), 606-676-0015 (Somerset), 502-603-0480 (Georgetown)
Chat live on our website during business hours.
Stop by our Kentucky showrooms in Lexington, Somerset, or Georgetown for personalized recommendations.
What makes this mattress different
Flagship XCS cooling
BlackICE™ Max Cooling Technology delivers 30% more cooling power than the prior generation, topped by a cool-to-the-touch Sleep Climate Surface — the strongest cooling system in the Beautyrest Black hybrid line.
2K Micro Coils (the Series Four upgrade)
A dedicated 2,000-micro-coil layer sits above the main support unit, adding a second level of individualized, instantly-responsive contouring under your pressure points — more cushion than base Series Three, a step below Series Five's 4K micro coils.
Balanced medium feel
Rated about 5–6 out of 10, the medium tuning is the line's most universal feel — pressure relief at the shoulders and hips with steady spinal support for combination sleepers and couples.
Adjustable & split-head ready
Compatible with standard and split-head adjustable bases; the ContourCover is engineered for optional Split Head Queen / Split Head King sizing not offered on lower Black hybrid tiers.
Triple-Stranded Pocketed Coils do the support work — then XCS adds a 2K micro-coil layer on top
The Series Four XCS Medium is built on a Triple-Stranded Pocketed Coil support unit: each coil is individually wrapped and flexes on its own, so the surface follows your body, isolates a partner's movement, and keeps a stable, sit-friendly edge on the 15-inch build.
What makes this an XCS bed is the cooling and the micro coils stacked above that core. BlackICE™ Max moves body heat away for 30% more cooling power, the cool-to-the-touch Sleep Climate Surface pulls heat on contact, and FORM HD, TotalEmbrace™ XHD, and Dynamic Response foams shape the medium feel.
Compared with the step-down base Series Three XCS, Series Four adds a dedicated 2K Micro Coil layer for an extra level of individualized contouring and quicker rebound; the step-up Series Five goes further with 4K micro coils and enhanced edge support. Series Four Medium is the sweet spot — flagship XCS cooling plus added cushion, in the firmness most sleepers reach for first.
Shop all Beautyrest mattresses →Built for the way you actually sleep
Combination sleepers - The balanced medium feel (about 5–6/10) is not committed to a single position, so it works whether you rotate between side, back, and stomach through the night.
Couples who can't agree - Medium is the easiest compromise when one partner wants more give and the other wants more support, and the Triple-Stranded Pocketed Coils keep one person's movement from waking the other.
Side and back sleepers - TotalEmbrace™ XHD foam plus the 2K micro coils cradle the shoulders and hips while the coil core keeps the lower back aligned.
Hot sleepers - BlackICE™ Max (+30%) and the cool-to-the-touch Sleep Climate Surface make this the strongest cooling choice in the Beautyrest Black hybrid family — the right pick if you sleep warm.
Specifications
| Height | 15" |
|---|---|
| Feel | Medium Hybrid |
| Firmness | 5 out of 10 (10 = firmest) |
| Construction | Sleep Climate Surface (cool-to-the-touch) + ContourCover with FORM HD Material + FORM HD Max Material + TotalEmbrace XHD Memory Foam + Dynamic Response Memory Foam + 2K Micro Coils + Triple-Stranded Pocketed Coil support over a foam base |
| Cooling | BlackICE Max Cooling Technology — 30% more cooling power than the prior generation — topped by a cool-to-the-touch Sleep Climate Surface that pulls heat from the sleep surface on contact; the strongest cooling system in the Beautyrest Black hybrid range. |
| Motion isolation | Excellent — Triple-Stranded Pocketed Coil Technology lets coils flex independently to isolate movement so a partner's motion is not transferred across the bed; layered FORM HD foams plus a perimeter-reinforced coil unit keep a stable edge on the 15-inch build. |
| Weight capacity | — |
| Adjustable base | Yes, compatible with adjustable bases (including split-head adjustable bases via Split Head Queen / Split Head King sizes) |
| Certifications | CertiPUR-US certified foams |
| Warranty | 10-year limited warranty |
| Trial period | [100] days at Mattress Overstock |
Frequently asked questions
How firm is the Beautyrest Black® Hybrid Series Four XCS Medium?
We rate it about 5–6 out of 10 (10 = firmest), which puts it squarely in the medium part of the lineup — plush enough to relieve pressure at the shoulders and hips, supportive enough to keep your spine aligned. It is the most universally comfortable feel in the XCS line. The right fit still depends on your sleeping position, body type, and whether you like to sleep more on top of the mattress or more in it.
How is the Series Four XCS Medium different from the Series Three and Series Five XCS?
All three are XCS, so they share BlackICE™ Max cooling (+30%), the Sleep Climate Surface, and the Triple-Stranded Pocketed Coil core. The difference is the micro-coil layer: base Series Three gives you the cooling and coil support; this Series Four adds a 2K Micro Coil layer for more cushion and individualized contouring; Series Five steps up to 4K micro coils plus enhanced edge support. If you want flagship XCS cooling with an added comfort layer at the line's sweet spot, Series Four Medium is the one most shoppers land on — worth comparing side by side in our showroom.
Does it work with an adjustable base or a split-head base?
Yes. It is compatible with standard adjustable bases for reading, TV, and zero-gravity positions. XCS also offers it in Split Head Queen and Split Head King sizes — the dynamically-designed ContourCover is engineered for split-head adjustable bases so each side articulates independently, a configuration the lower Beautyrest Black hybrid tiers do not offer.
How fast can I get it delivered in Kentucky?
We deliver with our own team across Kentucky — including Lexington, Georgetown, Somerset, London, and Richmond — so your mattress is handled by us, not a third-party freight company. Most orders arrive the next business day when the size is in stock. In-store pickup is also available at our Kentucky locations.
What if I don't like it after a few nights?
You have our 100-night comfort guarantee to make sure the feel is right. We usually recommend giving any new mattress at least 21 nights before deciding, because the cover, foams, and new micro-coil layer need time to settle and your body needs time to adjust to a medium hybrid surface.
Is a medium too soft if I usually sleep on a firmer bed?
Not for most sleepers. At about 5–6 out of 10 the Series Four XCS Medium reads as a true middle-of-the-road feel — it has real support from the Triple-Stranded Pocketed Coils underneath, so it does not sleep "soft" the way an all-foam bed can. If you prefer to sleep more on top of the mattress with a firmer, more on-the-surface feel, compare it against the XCS Firm; if you want deeper hug and more give, look at the XCS Plush. We have these feels on the floor in Kentucky so you can decide by lying down.
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.