9 Best King Mattresses for Adjustable Bases (October 2026)
The best king mattresses for adjustable bases include the MLILY EGOHOME King 14 inch Memory Foam for a taller foam profile, the Novilla Bliss King Size Mattress for a medium-plush feel, and the Zinus Memory Foam 12 Inch Green Tea for a medium-firm foam feel.
On this page (5 sections)
- Which king mattress works best on an adjustable base?
- What should you check before buying a king mattress for an adjustable base?
- Is memory foam or hybrid better for an adjustable base?
- How do you choose the right king mattress for an adjustable base?
- Check the base maker's maximum mattress height and the mattress maker's compatibility instructions.\n\nThe picks here range from 12 to 14 in thick."
The best king mattress for an adjustable base is usually a flexible all-foam mattress in a height and weight range approved by the base maker. Our top pick is the MLILY EGOHOME King 14 inch Memory Foam; the Ashley and Novilla hybrids add coil support, but need compatibility confirmation.
A standard king mattress is one 76 x 80 in sleep surface. To compare bedroom fit and dimensions, see queen vs king mattress sizes.
A split king uses two narrower mattresses, so each sleeper can adjust their side independently; the ESHINE bundle below is a split king base and mattress, not one standard king mattress.
Before choosing, compare construction, profile, mattress weight and the base maker's requirements. Our mattress buying guide can help you narrow down feel and materials, while this guide focuses on the fit between a king mattress and an adjustable base.
Our picks at a glance
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1
Best for a taller foam profileMLILY EGOHOME King 14 inch Memory Foam
9.7/10 our score
See it on Amazon -
2
-
3
Best for a medium-firm foam feelZinus Memory Foam 12 Inch Green Tea
9.5/10 our score
See it on Amazon
- 4
Check itESHINE Split King Adjustable Bed Frame
Best for a bundled split king setup - 5
Check itSignature Design by Ashley 12 Inch Hybrid
Best for a pocket-coil hybrid - 6
Check itEGOHOME King Size Memory Foam Mattress
Best for green tea gel foam - 7
Check itNovilla 12 Inch King Size Mattress
Best for a hybrid with reinforced edges - 8
Check itAvenco SyncDeep King Size Mattress 12 Inch
Best for a firmer hybrid feel - 9
Check itSweetnight CoolNest 14 Inch King Size Mattress
Best for a cooling foam design
Which king mattress works best on an adjustable base?
A flexible all-foam king is a sensible starting point because foam can bend as the base raises or lowers. The MLILY EGOHOME is our top pick here, while shoppers who want coils should verify compatibility with the mattress and base makers.
MLILY EGOHOME King 14 inch Memory Foam: Best for a taller foam profile
- 14 in memory foam
- Medium firm feel
- Graphene cooling cover
- CertiPUR-US certified foam
A 14-inch all-foam king with a medium-firm feel and a cover designed to regulate temperature. Check the height and flexibility guidance for your base.
Pros
- Foam construction
- Medium-firm feel
- 10-year limited warranty
Cons
- No trial period
- Opened mattresses cannot be returned
The MLILY EGOHOME has a 14-inch profile and medium-firm feel. Its construction is memory foam, including a gel memory foam comfort layer and high-density base foam.
The cover combines cooling fabric with graphene technology, and the foam includes copper gel and Adaptifoam. Those features are relevant if you want a foam mattress with airflow and temperature-regulating design details.
MLILY specifies that the mattress arrives compressed and needs 12 hours to expand. Its 10-year limited warranty is included, but there is no trial period and opened mattresses cannot be returned, so review those terms before ordering.
At 96 lb, it is the heaviest listed standalone mattress in this group. Check your base's weight capacity and make sure its instructions allow a 14-inch mattress before choosing this taller foam option.
Novilla Bliss King Size Mattress: Best for a medium-plush feel
- 12 in gel memory foam
- Three-layer foam design
- Breathable knit cover
- 100-day trial
This 12-inch foam mattress has a medium-plush feel and a three-layer design. Its lower profile may suit shoppers who want less mattress height to manage.
Pros
- Foam construction
- 12-inch profile
- 100-day trial
Cons
- Medium-plush feel may not suit firm-feel shoppers
- Confirm adjustable-base compatibility
The Novilla Bliss is a 12-inch, medium-plush memory foam king with a three-layer design. The knit cover and gel memory foam are described as cooling features, while the foam layers are designed to distribute weight.
Its 12-inch height gives you a lower-profile option than the 14-inch picks. Novilla says the mattress typically regains its shape within 72 hours and includes a 100-day trial and 10-year protection.
The maker describes the foam mattress as fitting all kinds of bed frames. That general statement does not confirm repeated flexing on an adjustable base, so ask Novilla for approval for your specific base and use.
Choose it if you prefer a softer feel and want a standard king in all-foam construction. Older shoppers can also compare our adjustable bed mattress guide for seniors.
If you need firmer support, compare the Zinus and EGOHOME foam options below.
Zinus Memory Foam 12 Inch Green Tea: Best for a medium-firm foam feel
- 12 in memory foam
- Medium firm feel
- Green tea and charcoal infused foam
- CertiPUR-US certified foam
A 12-inch king with a medium-firm feel and layered foam, including a high-density base layer. Zinus says the mattress may take up to 72 hours to regain its shape.
Pros
- Foam construction
- 12-inch profile
- 10-year limited warranty
Cons
- Allow time for expansion after unboxing
- Confirm base guidance
Zinus gives you a 12-inch medium-firm foam mattress with three foam layers: 3 inches of conforming memory foam, 2 inches of comfort foam and a 7-inch high-density base. Read our Zinus Green Tea mattress review for a closer look at this model.
That layered foam construction makes it a reasonable candidate to investigate for an adjustable base.
The green tea and ActivCharcoal infused foam is part of Zinus's design. The mattress is CertiPUR-US certified, and the brand says it may need 24 to 72 hours to regain its full shape after unpacking.
Zinus lists a maximum weight capacity of 500 lb for sizes other than twin. Compare that limit with your sleepers and bedding, and check the adjustable base's separate capacity as well.
Pick this model if you want a medium-firm feel at a 12-inch height. Read our best adjustable bed mattress guide for a wider look at mattresses made for adjustable setups.
ESHINE Split King Adjustable Bed Frame: Best for a bundled split king setup
- Split king adjustable bed bundle
- 14 in hybrid mattress included
- Head and foot incline
- Remote with memory presets
This is a split king adjustable base bundle that includes a 14-inch hybrid mattress. Consider it if you need the base as well as a mattress, and check the split setup against your room and bedding.
Pros
- Base and mattress come together
- Head and foot incline
- Remote has three memory presets
Cons
- Split king is not one standard king mattress
- Assembly required
The ESHINE option is a complete split king adjustable-bed bundle with a 14-inch hybrid mattress. Its base offers head and foot incline, and the remote includes Zero Gravity mode, Anti-Snore adjustment and three memory presets.
This bundle is different from buying a standalone king mattress: split king lets each side move separately. The package includes a base and mattress shipped in four boxes, which may arrive separately, and assembly is required.
ESHINE describes its included mattress as a premium spring mattress with gel-infused foam. The specs identify a split king format, but do not give the mattress's flexibility or individual half dimensions, so confirm those details and bedroom access before ordering.
Choose it if you need the adjustable base and mattress together. If you already own a base and need one continuous king sleep surface, compare the standalone options instead.
Signature Design by Ashley 12 Inch Hybrid: Best for a pocket-coil hybrid
- 12 in hybrid construction
- Individually wrapped coils
- Medium feel
- Two perimeter coil rows
A 12-inch medium hybrid combines gel memory foam with individually wrapped coils. Ask Ashley whether this model is approved for repeated bending on your adjustable base.
Pros
- Pocketed coil construction
- 12-inch profile
- Two perimeter rows for edge support
Cons
- Base compatibility needs confirmation
- Foundation and frame sold separately
The Ashley Signature Design is a 12-inch medium hybrid with gel memory foam and 360 individually wrapped coils. Two perimeter coil rows are designed to provide edge support, and the construction is intended to reduce motion transfer.
A hybrid's coil system can affect how it bends, so check that Ashley approves this mattress for your adjustable base. Its dimensions are 79.5 x 76 x 12 in, close to the common king footprint, but it's still useful to compare the mattress and base dimensions.
Ashley says to allow 48 hours for the mattress to expand after unboxing. The foundation, box spring and frame are sold separately.
Choose this pick if you prefer a hybrid feel and want individually wrapped coils. For more options in that construction, see our best hybrid mattresses for adjustable beds roundup.
EGOHOME King Size Memory Foam Mattress: Best for green tea gel foam
- 12 in memory foam
- Medium firm feel
- Green tea gel
- CertiPUR-US certified
This 12-inch, medium-firm foam mattress uses green tea gel and a bubble-hole structure. Its all-foam build is a practical starting point when comparing adjustable-base options.
Pros
- Foam construction
- 12-inch profile
- 10-year warranty
Cons
- Confirm the base maker's weight and flex guidance
- No trial details included here
The EGOHOME King Size Memory Foam is a 12-inch medium-firm foam mattress with a breathable bubble-hole structure and green tea gel. The maker describes its foam as adapting to body curves and distributing pressure.
Its height is 2 inches less than the 14-inch EGOHOME pick above, which may make it easier to fit under a low headboard or within a base's height guidance. The mattress is listed at 80 x 76 in and has a 10-year warranty.
EGOHOME describes this as a king memory foam mattress, making it a straightforward material to compare with adjustable-base requirements. Confirm the base's supported mattress thickness and weight before you buy.
This is a good option to compare if you want a medium-firm, all-foam mattress without the taller profile. Check the maker's current instructions for expansion time and care.
Novilla 12 Inch King Size Mattress: Best for a hybrid with reinforced edges
- 12 in hybrid
- SmartS coils
- Reinforced perimeter
- CertiPUR-US certified foam
This 12-inch hybrid pairs foam with SmartS coils and reinforced perimeter support. Confirm with Novilla that the coil system can flex with your base.
Pros
- Hybrid construction
- 12-inch profile
- Reinforced perimeter support
Cons
- Base compatibility needs confirmation
- Medium-plush feel
The Novilla 12 Inch King is a medium-plush hybrid that combines foam with SmartS coils. Its AirBreeze fabric is designed to wick moisture, and the mattress has reinforced perimeter support.
The 12-inch height is in the same profile range as several foam and hybrid choices here. Novilla does not specify adjustable-base compatibility in the details available for this model, so ask whether the coil system is approved to bend with your frame.
This pick suits shoppers who want a hybrid construction and a stronger edge design. Keep the base's motion pattern and weight limit in mind when comparing it with an all-foam mattress.
For sizing alternatives, our best full mattress for an adjustable base and best queen mattress for an adjustable base roundups cover smaller sleep surfaces.
Avenco SyncDeep King Size Mattress 12 Inch: Best for a firmer hybrid feel
- 12 in hybrid
- Firm feel
- Zoned lumbar support
- Individually wrapped pocket coils
A firm 12-inch hybrid with pocket coils and a zoned support design. Check Avenco's guidance for adjustable bases before pairing it with a flexing frame.
Pros
- Firm feel
- 12-inch profile
- Individually wrapped coils
Cons
- Base compatibility needs confirmation
- Firm feel may not suit plush-feel shoppers
Avenco's SyncDeep is a firm, 12-inch hybrid king with gel foam, airflow pocket springs and individually wrapped coils. Its zoned support design and reinforced perimeter are intended to provide structure across the sleep surface.
The firm feel can suit shoppers who prefer less sink than a medium-plush mattress. The construction is a pocket spring hybrid, so verify that Avenco approves it for your adjustable base and that the base can support its total load.
Avenco describes the mattress as compressed in a box and includes a 100-night trial and 10-year protection. Those terms are separate from adjustable-base compatibility, which is the key check before purchase.
Pick it if firm feel and coil construction are your priorities. Compare the setup and return terms with the other hybrid mattresses before making a decision.
Sweetnight CoolNest 14 Inch King Size Mattress: Best for a cooling foam design
- 14 in memory foam
- CoolNest cooling system
- Five-zone support design
- CertiPUR-US certified foam
This 14-inch foam king combines gel-infused memory foam with a five-zone design. Check the taller profile against your base's stated limits and room setup.
Pros
- Foam construction
- Five-zone design
- 10-year protection
Cons
- 14-inch profile
- Confirm base guidance
The Sweetnight CoolNest is a 14-inch medium memory foam mattress with a five-zone design. Its CoolNest system combines PCM high-resilience foam and gel-infused memory foam, while the cover is designed to improve breathability.
This is one of the taller profiles in the group, so check the base maker's maximum mattress height and bending instructions. Sweetnight says the mattress arrives compressed and should be allowed 72 hours to expand.
The foam is CertiPUR-US certified, and Sweetnight includes 10-year protection. The 14-inch height and 86.6 lb weight are useful figures to compare against your base and bedroom setup.
Choose it if cooling-focused foam details matter and your base supports a 14-inch mattress. If you want a thinner profile, the 12-inch options above offer alternatives.
What should you check before buying a king mattress for an adjustable base?
Check the mattress maker's compatibility guidance, the base's weight limit and the mattress height before you buy. A mattress that fits a standard king frame is not automatically approved for an adjustable base.
First, confirm the mattress size. A standard king is one mattress measuring about 76 x 80 in.
A split king uses two pieces. The ESHINE bundle here is split king, so it suits a different setup from one continuous king mattress.
Next, check construction and flexibility. Foam options are a practical place to start, but each model still needs approval for your frame.
Hybrids add coils, and coil type or perimeter design alone doesn't tell you whether a mattress can bend safely over time.
Then compare total weight, including sleepers and bedding, with the base's capacity. Mattress thickness also matters: a taller mattress can change how far it bends and how it sits beneath a headboard or side rail.
Our guide to what mattresses work with adjustable bases explains the compatibility checks in more detail. If you're considering coils, see whether hybrid mattresses work on adjustable bases before deciding.
Is memory foam or hybrid better for an adjustable base?
Memory foam is often the simpler construction to evaluate for an adjustable base because it has no coil unit to check. A hybrid may also work, but the mattress maker should confirm its coil design can flex with your specific frame.
The foam picks in this roundup range from 12 to 14 in and include medium-plush, medium and medium-firm feels. Those differences affect the feel and profile, so consider them alongside the base requirements.
The Ashley, Novilla and Avenco hybrids use pocketed coils or a spring system. That construction can offer a different feel, but the product details here do not confirm compatibility with a particular adjustable base.
If you want a closer material comparison, read memory foam vs hybrid mattress. Match the feel you prefer with written compatibility guidance from both makers.
How do you choose the right king mattress for an adjustable base?
Choose by mattress size, confirmed base compatibility, profile and preferred feel, in that order. The highest score helps narrow the options, but it doesn't replace checking the maker's rules for your exact frame.
Our score weighs specs and features against what you're shopping for: a king mattress that can work with an adjustable base. We favor clear construction and useful profile details, while treating unconfirmed compatibility as something to verify.
Pick the MLILY EGOHOME 14-inch mattress if you want a medium-firm all-foam option with a taller profile. Choose the Novilla Bliss for a medium-plush 12-inch foam feel, or compare the Zinus for a medium-firm 12-inch build.
For a hybrid, start with the Ashley, Novilla or Avenco and contact the maker about flexing. Choose the ESHINE bundle only if a split king base and included mattress match your setup.
Review ongoing back pain or sleep problems with a health professional. Before buying, save the mattress and base compatibility guidance so you can compare it with the size, weight and height in your room.
faq:
- q: "Can you use a king mattress on an adjustable base?" a: "Yes, if the mattress maker approves it for adjustable-base use and the mattress fits the base's size and weight limits. Standard king mattresses are one continuous surface, while split king bases use two separate mattresses.\n\nCheck the exact base model and mattress instructions before buying."
- q: "Are memory foam mattresses good for adjustable bases?" a: "Memory foam is often a practical material to consider because it can flex as the base moves. Still, confirm that the specific mattress maker allows adjustable-base use and check the base's weight and mattress height limits.\n\nFoam construction alone does not confirm compatibility."
- q: "Can a hybrid king mattress work on an adjustable bed?" a: "Some hybrids may work, but the coil system and mattress construction matter. Ask the mattress maker whether that exact model is designed for repeated bending on your adjustable base.\n\nThen compare the mattress and sleepers' combined weight with the base's limit."
- q: "Is a split king the same as a king mattress?" a: "No. A standard king is one mattress, while a split king typically uses two separate mattresses so each side can move independently.\n\nCheck what your base requires before ordering sheets or a mattress.
The ESHINE pick in this guide is a split king bundle."
- q: "Does mattress thickness matter on an adjustable base?" a: "Yes. A taller mattress may bend differently and can sit higher beneath a headboard or side rail.
Check the base maker's maximum mattress height and the mattress maker's compatibility instructions.\n\nThe picks here range from 12 to 14 in thick."
Our top 3 picks at a glance
-
1
Best for a taller foam profile
MLILY EGOHOME King 14 inch Memory Foam
9.7/10 our score
See it on Amazon -
2
-
3
Best for a medium-firm foam feel
Zinus Memory Foam 12 Inch Green Tea
9.5/10 our score
See it on Amazon
