
Quick answer: The Beautyrest Black Series Four Firm Summit Pillow Top is the pick for shoppers who want a distinctly firm, tall hybrid with a plush-top profile and premium coil package—and who are comfortable paying flagship-level money. I would shortlist it for back and stomach sleepers who prefer a firm surface. If you want a deep, soft cradle for side sleeping, a lower profile, or a better price-to-spec ratio, I would keep looking.
- Feel: Firm Summit Pillow Top; do not confuse the cushioned top with a plush overall feel.
- Build: Triple-Stranded Pocketed Coil® support, 4K Nano Coils, foam comfort layers, Self-Response™ Latex and BeautyEdge®, as described by Beautyrest and the retailer.
- Height: approximately 17.5 inches.
- Price: Sit 'n Sleep listed the mattress-only Twin XL at $4,949.99, Queen at $5,599.99 and King at $6,599.99; see the full size ladder below.
- Purchase terms: Sit 'n Sleep displays a 120-night sleep trial and a 10-year warranty. Review the seller's current trial, return and warranty terms before checkout.
What makes this Series Four model different?
The name tells you two things that matter at checkout. Series Four is the high-spec end of the Beautyrest Black family, while Firm Summit Pillow Top identifies this exact feel and top construction. This is not the plush Series Four, the medium model, or a standard-top mattress. Those configurations share the family name but are not interchangeable when you are choosing pressure relief or comparing a quoted price.
Beautyrest describes Series Four as using Triple-Stranded Pocketed Coil® Technology and 4K Nano Coils for its most premium individualized support. The Summit Pillow Top adds a quilted, cushioned surface above the support system. The extra top padding is meant to soften first contact; it does not turn a product sold as Firm into a Plush model. If you like a firm base with some surface cushioning, that combination is the point. If you expect to sink deeply into a soft bed, the word “pillow top” may set the wrong expectation.
Beautyrest's Series Four product information describes foams that contour to the body and respond to movement. Sit 'n Sleep's product description also names Micro Diamond™ Memory Foam, Self-Response™ Latex and temperature-management features. Those are manufacturer and seller descriptions of the materials and intended functions; they are not a promise that every sleeper will feel cooler or experience a particular level of pressure relief.

Which sleepers are most likely to like the firm feel?
Back sleepers: Start here if you want a firm, buoyant surface rather than a slow, deep foam hug. The Summit top may add a little initial cushioning, but the model is still marketed as firm. If your usual mattress feels too soft or lets your hips dip, this is the kind of feel to test in person if a nearby retailer offers a floor model.
Stomach sleepers: A firmer surface is often the more sensible starting point for stomach sleeping than a plush pillow top, because the midsection can feel unsupported on a very soft mattress. The firm designation is the reason this configuration belongs on your shortlist—not proof that it will suit every body or sleep position. Your comfort depends on your build, sleep habits and the mattress you are used to.
Combination sleepers: Consider how much you move and whether you like a surface that pushes back. Beautyrest says the coil package responds to movement; the individual coil design is intended to provide localized support. A thick, 17.5-inch bed can also feel different at the edge and when you sit down than a thinner mattress. If changing positions easily is a priority, compare it in person rather than relying on the “pillow top” label.
Side sleepers: I would be cautious if you need generous shoulder and hip cushioning. Some side sleepers prefer a firm mattress, but many need a more yielding comfort layer to reduce pressure at those contact points. A pillow top adds a cushioned layer, yet this model is specifically the Firm version. If you know you prefer a softer feel, compare the Series Four Plush or Medium Summit Pillow Top instead, and verify the exact model, height and price with the seller.
What does the 17.5-inch profile mean for your bedroom?
The listed mattress height is approximately 17.5 inches, which makes it substantially taller than a low-profile bed. That deep build can create the substantial look many luxury-mattress buyers want, but it changes practical details: fitted sheets need pockets deep enough for the mattress and any protector, and your existing frame height affects how easy it is to get in and out of bed. Measure the frame-to-floor height and check the sheet maker's pocket-depth guidance before ordering.
Sit 'n Sleep lists a 1–1.5-inch medium comfort-foam base layer in its specifications and says the mattress is adjustable-base friendly. That does not tell you every layer thickness, nor does “adjustable friendly” replace the base maker's compatibility guidance. Confirm the exact base and foundation requirements if you plan to use a motion base or an existing platform.
What are the listed sizes and prices?
The price ladder below is for the mattress-only selection on Sit 'n Sleep's Firm Pillow Top product page. The retailer's page identifies this as an online-only product and notes that a mattress-recycling fee is added at cart. Prices can change; reselect your size and review the cart total before paying.
| Size selected | Listed mattress price | Listed height |
|---|---|---|
| Twin XL | $4,949.99 | Approx. 17.5 in |
| Full | $5,229.99 | Approx. 17.5 in |
| Queen | $5,599.99 | Approx. 17.5 in |
| King | $6,599.99 | Approx. 17.5 in |
| California King | $6,599.99 | Approx. 17.5 in |
Budget for more than the sticker price. The price table is for the mattress selection, not an added box spring or adjustable base. Sit 'n Sleep's listing showed a separate base selector, and it notes the recycling fee is added in the cart. Ask the seller whether your delivery address qualifies for the delivery option shown, whether old-mattress removal is included, and what the final checkout total will be.
How does the support system work?
The core is a pocketed-coil hybrid. Beautyrest says its Triple-Stranded Pocketed Coil® Technology is designed for individualized support and motion separation; the coils sit beneath the comfort materials rather than forming one connected spring unit. In plain terms, a pocketed design lets sections of the mattress respond more locally than a continuous coil system. That is a construction explanation, not a guarantee that a partner's movement will never reach you.
The Series Four Summit Pillow Top's signature step-up is its 4K Nano Coils. Beautyrest says Series Four has twice as many micro coils as its Series Three Pillow Top model to increase conformability. Those smaller coils add another responsive layer above the main support system. You are paying for a more involved build, but the meaningful question is whether you can feel and use that difference—not whether a bigger specification automatically makes a better mattress for your sleep style.
Sit 'n Sleep lists Micro Diamond™ Memory Foam, Self-Response™ Latex, temperature management and BeautyEdge® as features. The memory foam is the contouring component; latex is described by the retailer as responsive and intended to relieve pressure while allowing airflow; and BeautyEdge® is the named edge-support feature. If you sit on the edge to dress or use the full sleep surface, edge support may matter more to you than a marketing phrase about luxury. The source listing does not provide a verified edge-sitting test result, so I would try it in a showroom if that is a deciding factor.
What do the trial, returns, delivery and warranty cover?
These terms come from different parts of the purchase, so do not treat them as one promise. Sit 'n Sleep displays a 120-night sleep trial, local delivery, a 10-year warranty and mattress removal on the product page. Beautyrest's own product page advertises a 100-night in-home trial, free shipping and returns, White Glove Delivery, free mattress removal and a 10-year warranty. The retailer's offer and the manufacturer's direct-sale offer are separate purchase paths; the terms shown for one do not automatically apply to the other.
Before checkout, open the seller's current trial and return policy and confirm the exact mattress is eligible. Check when the trial starts, whether there is a required break-in period, whether a return or pickup fee applies, how the refund is calculated, and whether the policy is limited by location. A headline that says “120-night trial” is not a substitute for those details. Ask which warranty document applies to your specific model and seller, and read its coverage, exclusions, foundation requirements and claim process.
For delivery, confirm whether the quoted service includes carrying the mattress into the room, setup, removal of packaging and haul-away of your old bed. The retailer advertises local delivery and mattress removal, but address eligibility and appointment details can affect what you receive. Get the promised services written into the order confirmation.
Who should not buy this mattress?
- Skip it if you want a plush, sink-in feel. This is the Firm model; the Summit Pillow Top cushions the surface but does not change the named firmness.
- Skip it if you need the lowest possible height. At about 17.5 inches, it can make an already tall bed awkward and may require deep-pocket sheets.
- Skip it if your budget is the deciding factor. The checked retailer listing puts the Queen at $5,599.99 and King at $6,599.99 before any additional base or recycling charge.
- Pause if you cannot confirm the return rules. At this price, have the trial and pickup terms in writing before delivery—not after you discover the surface is firmer than expected.
- Do not choose by model family alone. Firm, Medium and Plush versions are distinct comfort choices. Confirm “Firm Summit Pillow Top” on the order.
How does it compare with other Beautyrest Black options?
Compared with Series Three Summit Pillow Top: Series Four is the step-up if the 4K Nano Coil configuration and the most premium version of the line are the draw. Beautyrest positions Series Four with twice the micro coils of the Series Three Pillow Top. If that specific added coil layer does not address a comfort problem you actually have, Series Three may be the more sensible place to compare prices. Compare the same size and the same feel; a Firm quote should not be compared against a Plush mattress as if the surface were identical.
Compared with a Beautyrest Black Series Two: The Series Two is a more middle-of-line Black hybrid, while this Series Four model is the top-tier Summit Pillow Top. Our Beautyrest Black Series Two review explains the lineup differences and what to look for when comparing a less expensive Black configuration. I would pay extra for Series Four only if you specifically want its pillow-top build and higher-spec coil package.
Compared with the Beautyrest Black Hotel 2 Pillow Top: Both names promise a pillow-top Black mattress, but a hotel-branded model and a Series Four retail model can have different construction and purchase terms. Do not assume the feel, height or warranty carries over between them. Read our Beautyrest Black Hotel 2 Pillow Top review for that separate model, then compare the actual specifications on the order you are considering.
My buying call: If you already know you like firm hybrids and you value the Series Four coil build, this is a coherent premium pick. If you are uncertain about firmness, start with a showroom tryout or a seller with clearly written return terms. Do not pay for the highest series just because it is the most expensive one; pay for a feel and build you can name.
Frequently asked questions
Is the Beautyrest Black Series Four Summit Pillow Top firm or soft?
This exact version is the Firm Summit Pillow Top. Its cushioned top adds surface padding, but the seller identifies its overall feel as firm. Beautyrest sells other Series Four comfort options, so confirm the full firmness name before ordering.
How thick is the Series Four Firm Summit Pillow Top?
Sit 'n Sleep lists the mattress at approximately 17.5 inches high. Measure your bed frame and check your fitted-sheet pocket depth before purchase.
What is the price of a Queen or King?
Sit 'n Sleep's product selector displayed $5,599.99 for Queen and $6,599.99 for King. Those are the retailer's listed mattress prices; verify the size selector and cart total because prices and extra charges can change.
Does this model have a sleep trial?
Sit 'n Sleep displays a 120-night sleep trial for its listing. Beautyrest's direct product page advertises a 100-night in-home trial. The seller's policy for the exact order controls your retailer purchase, so read the current return conditions before you buy.
Does it work with an adjustable base?
Sit 'n Sleep marks the mattress as adjustable-base friendly. Check the specific base manufacturer's compatibility and support requirements before pairing it with an existing frame.
Is the Firm Summit Pillow Top right for side sleepers?
It may suit side sleepers who specifically prefer a firm surface, but it is not my first choice for someone seeking deep shoulder and hip cushioning. Compare the Medium or Plush Summit Pillow Top and verify the feel in person when possible.
Final verdict: who should buy it?
The Beautyrest Black Series Four Firm Summit Pillow Top is a premium, 17.5-inch firm hybrid with a high-end pocketed-coil system and a cushioned top. Its strongest case is for a back or stomach sleeper who knows they like a firm feel, wants the Series Four construction, and is prepared for the listed price. Its biggest caution is straightforward: a pillow top does not make a firm mattress plush, and the Queen and King prices are high enough that you should confirm fit and return terms before committing.
I would try it if the firmness matches your preference, the tall profile works with your bed, and the retailer's 120-night trial and warranty fit your expectations in writing. I would pass if you want a softer cradle or are buying the Series Four badge without a reason to choose its specific support and comfort package.