Beautyrest
Beautyrest Black® Series Four 17.5" Medium Pillow Top Mattress
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The honest verdict: the Series Four Medium Pillow Top is the flagship medium of Beautyrest Black, the most refined version of the universal feel the brand makes. At a true 5 out of 10 on a luxurious 17.5-inch build, it carries everything the lower three series do and adds the flagship upgrades: 4K Micro Coils for the most individualized support Black builds, an Apex Top edge on every model, and added HD Memory Foam for the deepest pressure relief in the line. If you want the best medium Beautyrest Black offers, this is the top of the ladder.
What it's made of, and what that does for you
A true medium catches you at the shoulders and hips without swallowing you, and holds your spine in a straight line. The Series Four builds that balance with the most precise hardware in the line.
- 4K Micro Coils, the flagship support. The finest, most responsive coil layer Black builds, twice the micro-coil density of Series Three, so support tracks the exact shape of your body instead of guessing at it.
- Apex Top edge support, standard on every Series Four. A reinforced perimeter, so the full width sleeps usable and the side stays firm when you sit to put on your shoes.
- HD Memory Foam plus Self-Response Latex. Added high-density foam and responsive latex for the deepest pressure relief in the line. The foam cradles your pressure points, the latex springs back the moment you move.
- SurfaceTouch Gel quilted into the surface. Immediate cushioned pressure relief from the first second you lie down, before the deeper layers take over.
- Sleep Climate cooling. A cool-to-the-touch cover and Micro Diamond foam pull heat off the surface, over coils that move air all night.
- A Triple-Stranded Pocketed Coil core. Under the comfort layers, an independently moving coil base carries the deep support and lets the bed breathe in a way all-foam never does.
- Flagship finish, true-medium feel. A 17.5-inch build with a cushioned pillow top and a quilted cashmere-blend cover, eight handles, CertiPUR-US certified foams, a 10-year warranty, and adjustable-base compatibility. Plan for deep-pocket sheets.
What you notice in the first few minutes
The pillow top gives first, a soft cushioned welcome quilted right into the surface. A second later the 4K Micro Coils and the core catch you and settle you into a level line. That feel, plush on top and precise underneath, is the whole point of the flagship. The surface reads cool to the hand right away, and the latex and coils answer the moment you turn, so a position change never wakes you all the way up.
Who it suits, and who it does not
This is the flagship all-rounder, built for all sleepers. Back and combination sleepers get the most precise support across positions, and couples get the full usable width and isolated motion of the Apex edge and pocketed coils.
- If you want the same feel for less. The Series Three Medium Pillow Top has 2K Micro Coils and most of the comfort, one tier down.
- If a very tall bed is a problem. At 17.5 inches plus a foundation this sits high, so measure your frame and your bedding first.
- If you want plush or firm specifically. Medium is the middle of the road; the Series Four plush and firm pillow tops bracket it, same flagship hardware, a softer or firmer surface.
Why buy it from Mattress Overstock
Locally owned and serving Kentucky since 2012, with five showrooms in Lexington (on Nicholasville Road), Georgetown, Somerset, London, and Richmond. This is a bed worth lying on before you commit, ideally right next to the Series Three so you can feel the step up. No appointment needed.
You get a 100-day comfort guarantee, the same length Beautyrest offers on this bed. 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, usually the next business day when your size is in stock. Everyone on the floor is paid the same no matter which brand you choose, so the guidance you get points at your back, not a spiff. Select your size to see the live Mattress Overstock price, then come feel the flagship against the rest of the Beautyrest Black lineup in Lexington this week.
What makes this mattress different
4K Micro Coils: the flagship support
The finest, most responsive coil layer Black builds, twice the micro-coil density of Series Three, for support that tracks your body precisely.
Apex Top edge support, standard
A reinforced perimeter on every Series Four: the full width sleeps usable and the side holds firm when you sit.
HD Memory Foam plus Self-Response Latex
The deepest pressure relief in the line. The foam cradles pressure points, the latex springs back the instant you move.
SurfaceTouch Gel quilted into the top
Immediate, cushioned pressure relief from the first second you lie down, before the deeper layers take over.
Sleep Climate cooling, cover to core
A cool-to-the-touch cover and Micro Diamond foam pull heat off the surface, over coils that move air all night.
Triple-Stranded Pocketed Coil base
An independently moving coil core carries the deep support and isolates motion so a partner barely crosses the bed.
True medium, luxurious 17.5-inch build
The universal feel for all sleepers, with flagship height, a cushioned pillow top, and a quilted cashmere-blend cover; backed by a 10-year warranty.
The flagship medium: every Black upgrade, top tier
The Series Four Medium Pillow Top is the top of the Black ladder. It carries everything the lower three series do and adds the flagship hardware, layer by layer from the surface down.
At the surface, a cool-to-the-touch quilted cover with SurfaceTouch Gel Memory Foam quilted directly in, so the first thing you feel is immediate, cushioned pressure relief. Just under it, Micro Diamond Memory Foam draws heat away from your body, part of the Sleep Climate cooling that runs through the whole bed.
In the comfort layers, 4K Micro Coils (the finest, most individualized coil support Black makes, double the micro-coil density of Series Three) work with added HD Memory Foam and responsive Self-Response Latex for the deepest pressure relief in the line. At the perimeter, an Apex Top reinforces the edge on every Series Four, so the full width sleeps usable. At the base, a Triple-Stranded Pocketed Coil core carries the deep support, isolates motion, and lets the bed breathe.
For the same true-medium feel with 2K coils a tier down, see the Series Three Medium Pillow Top. To feel the whole ladder side by side, the Beautyrest Black lineup is on the floor in all five Kentucky showrooms.
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.
The flagship all-rounder
Back sleepers: a true medium with 4K Micro Coils holds your spine in a straight line, cushioning the shoulders and hips without letting the middle sag.
Combination sleepers: the responsive latex and coils answer the instant you change positions, so moving from back to side never wakes you all the way up.
Couples: the Apex Top lets both of you use the full width to the edge, and the pocketed coils keep one person's movement from crossing to the other side.
Hot sleepers who still want plush: the cool-to-the-touch cover, Micro Diamond foam, and breathing coil base shed heat better than most beds this cushioned, though a firmer surface always breathes a little more.
Anyone replacing an older or sagging bed: the level line the 4K coils hold all night is exactly what a worn-out mattress stopped giving you.
Probably not for you if: you want the same feel for less (the Series Three Medium Pillow Top is a tier down), you need a low-profile bed (this stands 17.5 inches before the foundation), or you specifically want plush or firm rather than the middle (the Series Four plush and firm models bracket this one).
Specifications
| Height | 17.5" |
|---|---|
| Feel | Medium Pillow Top |
| Firmness | 5 out of 10 (10 = firmest) |
| Construction | Pillow top with 4K Micro Coils, HD Memory Foam, Self-Response™ Latex and Micro Diamond™ foam over a Triple-Stranded Pocketed Coil® core, with Apex Top edge support: 17.5 inches, medium. |
| Cooling | Cool-to-the-touch cover with Micro Diamond™ memory foam pull heat off the surface, over a coil system that breathes more than all-foam. |
| 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 makes Series Four the flagship?
Series Four includes everything from Series One through Three, plus 4K Micro Coils for the most individualized support Black builds, an Apex Top edge on every model, and added HD Memory Foam for the deepest pressure relief and a luxurious height.
How is it different from the Series Three Medium Pillow Top?
This Series Four has 4K Micro Coils (double the micro-coil density), an Apex Top edge as standard, and added HD foam. The Series Three Medium Pillow Top has 2K coils and most of the comfort, one tier down.
How firm is it?
A true medium, about 5 out of 10, made into the most precise version of that feel by the 4K Micro Coils, on a luxurious 17.5-inch build. Beautyrest builds its medium feel for all sleepers.
How tall is it, and will my sheets fit?
The build stands 17.5 inches before the foundation, so it sits high once it's on a base. Measure your frame, and plan for deep-pocket sheets sized for a tall pillow-top mattress.
Does it sleep hot?
It runs cooler than most beds this cushioned. A cool-to-the-touch cover and Micro Diamond memory foam pull heat off the surface, and the pocketed coil base moves air through the bed in a way all-foam mattresses can't. A firmer surface always breathes a little more, so if heat is your single biggest issue, ask the floor to show you a firmer model alongside it.
Is it good for couples and motion transfer?
Yes. The Triple-Stranded Pocketed Coils move independently, so a partner getting in or out barely crosses the bed, and the Apex Top edge lets both of you sleep all the way to the side.
Can I use it with an adjustable base?
Yes, the Series Four Medium Pillow Top is compatible with an adjustable base. Ask the floor about pairing it with one, and we can deliver and set up both together.
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, set it up, and haul the old mattress away. You also get a 100-day comfort guarantee, the same length Beautyrest offers: 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, ideally right next to the Series Three so you can feel the step up. Delivery is free across the Kentucky service area, with old-mattress haul-away included. 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.
