9 Best Medium Firm King Mattresses (November 2026)
The best medium firm king mattresses include the MLILY EGOHOME King 14 inch Memory Foam for a thicker foam feel, the Novilla Bliss Mattress King Size for cooling foam comfort, and the Novilla King Size Mattress 12 Inch for zoned hybrid support.
On this page (3 sections)
The best medium firm mattress king shoppers can start with is the 12-inch Novilla hybrid, which combines pocketed coils, comfort foam and zoned support. For an all-foam king, consider Zinus, while the 14-inch UniPon adds lumbar foam and a taller hybrid profile.
A king bed gives two sleepers more room to spread out, but width alone doesn't make a mattress comfortable. The feel, support system, height and motion transfer all affect whether the bed works for your room and sleep habits.
If you're still deciding which mattress to buy, compare construction and return terms alongside firmness. Our guide to firm vs soft mattress feel can help you narrow down the surface feel before choosing a size.
Our picks at a glance
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Best for a thicker foam feelMLILY EGOHOME King 14 inch Memory Foam
9.7/10 our score
See it on Amazon -
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Check itZinus Memory Foam 12 Inch Green Tea
Best for classic all-foam support - 5
Check itEGOHOME King Size Memory Foam Mattress
Best for green tea gel foam - 6
Check itUniPon Medium Firm King Size Mattress Upgrade
Best for lumbar-focused hybrid support - 7
Check itSignature Design by Ashley 12 Inch King
Best for medium foam feel - 8
Check itBedStory Medium Firm King Mattress
Best for zoned pocket springs - 9
Check itGrbsy 16 Inch King Size Mattress
Best for extra height and cushioning
Which medium firm king mattress stands out?
The Novilla King Size Mattress 12 Inch is the best fit for shoppers who want a clearly labeled medium firm hybrid with zoned pocket coil support. It combines comfort foam with individually wrapped coils and reinforced edge stability.
Novilla King Size Mattress 12 Inch: Best for zoned hybrid support
- 12-inch hybrid
- Medium firm feel
- Pocketed coils
- Zoned shoulder, hip and lumbar support
A 12-inch hybrid pairs comfort foam with individually pocketed coils. Zoned support and motion isolation make its features relevant to couples sharing a king bed.
Pros
- Medium firm feel
- Zoned pocket coil support
- Reinforced edge stability
Cons
- No trial or warranty terms provided here
A 12-inch profile keeps this hybrid closer to a conventional mattress height than the 14-inch picks below. Its pocketed coils are zoned for the shoulders, hips and lumbar area, while comfort foam adds a cushioning layer above them.
The independent coils are designed to absorb movement across the bed, which is useful if a partner shifts during the night. Reinforced edges also add stability near the perimeter, helping you use more of the king surface.
Choose it if you want a medium firm feel and coil support zones. If you prefer a taller bed or want a trial period, compare those terms with other options before ordering.
MLILY EGOHOME King 14 inch Memory Foam: Best for a thicker foam feel
- 14-inch 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. MLILY says its foam is CertiPUR-US certified.
Pros
- 14-inch profile
- Memory foam build
- Low motion transfer feature
Cons
- No trial period
- Opened mattresses cannot be returned
MLILY EGOHOME is the thickest all-foam option among the leading picks, with a 14-inch profile and a medium firm feel. Its cover uses graphene technology and is designed to regulate temperature, while the foam layers include copper gel aerofusion memory foam and Adaptifoam.
MLILY says the foam is CertiPUR-US certified and notes an ICA endorsement. The mattress ships compressed in a box, and MLILY advises allowing 12 hours for it to expand.
The return terms deserve close attention: MLILY says there is no trial period and opened mattresses cannot be returned. That makes it important to review the seller's current policy before buying.
Novilla Bliss Mattress King Size: Best for cooling foam comfort
- 14-inch gel memory foam
- Breathable knit cover
- Reinforced edge support
- 100-day free trial
This 14-inch foam mattress has a breathable knit cover, gel memory foam and reinforced edges. Its stated feel is medium plush, so it may suit shoppers who want a softer surface.
Pros
- Cooling features in cover and foam
- Reinforced edge support
- 100-day free trial
Cons
- Medium plush feel rather than medium firm
Novilla Bliss is a 14-inch king foam mattress with gel memory foam and a breathable knit cover. Its stated feel is medium plush, which may appeal if you want a softer surface than a traditional medium firm mattress.
The triple foam layers are described as absorbing motion, and the mattress has reinforced edge support. Novilla states that it usually regains its full shape within 72 hours, and offers a 100-day free trial with 10-year protection.
Choose it when cooling features and a softer feel matter more than a strict medium firm label. If you share the bed, its motion isolation features may also be worth considering.
Zinus Memory Foam 12 Inch Green Tea: Best for classic all-foam support
- 12-inch memory foam
- Medium firm feel
- Green tea and charcoal infused foam
- CertiPUR-US certified foam
This 12-inch king uses memory foam over comfort and base support foam. Green tea and charcoal are infused into the foam, and Zinus includes a 10-year limited warranty.
Pros
- Medium firm feel
- Three foam layers
- 10-year limited warranty
Cons
- Allow 24–72 hours for full expansion
Zinus Green Tea is a 12-inch all-foam king with a medium firm feel. Its listed layers are 3 inches of memory foam, 2 inches of comfort foam and 7 inches of high-density base support foam.
Green tea and ActivCharcoal are infused into the memory foam. Zinus says the foam is CertiPUR-US certified and includes a 10-year limited warranty; allow 24–72 hours for the compressed mattress to regain its full shape.
Its familiar foam construction suits shoppers who don't need pocket coils. Zinus describes this design as ideal for side sleepers and petite to average-weight sleepers, so consider that fit alongside your own comfort preferences.
EGOHOME King Size Memory Foam Mattress: Best for green tea gel foam
- 12-inch memory foam
- Medium firm feel
- Green tea gel
- CertiPUR-US certified
This 12-inch medium firm king uses memory foam with green tea gel and a bubble-hole structure intended to support airflow. EGOHOME lists a 10-year warranty.
Pros
- Medium firm feel
- Green tea gel foam
- 10-year warranty
Cons
- Foam mattress without pocket coils
EGOHOME's 12-inch king mattress uses medium firm memory foam with green tea gel. The brand describes the foam as pressure relieving and says its bubble-hole structure supports airflow.
This option has a more straightforward all-foam build than the hybrid mattresses in this guide. EGOHOME lists CertiPUR-US certification and a 10-year warranty for the mattress.
Choose it if you want a 12-inch profile and green tea gel in an all-foam design. If you prefer the feel of coils under foam, compare the Novilla or UniPon hybrids instead.
UniPon Medium Firm King Size Mattress Upgrade: Best for lumbar-focused hybrid support
- 14-inch hybrid
- Medium firm feel
- Pocket springs
- Extra lumbar foam
The 14-inch hybrid combines pocket springs with foam, including extra lumbar foam and support zones. UniPon states a 365-night trial and 10-year warranty.
Pros
- Medium firm feel
- Pocket springs with lumbar foam
- 365-night trial
Cons
- Heavier 110 lb mattress
UniPon's 14-inch king hybrid combines independent pocket springs with several layers of foam. Its extra lumbar foam and support zones make it a notable choice for shoppers who want targeted support around the hips and lower back.
The spring system is designed to reduce motion transfer, while the maker describes the surface as breathable. UniPon states a 365-night trial and 10-year warranty, which are useful terms to review before purchase.
At 110 lb, this is a heavier mattress than the 12-inch foam options here. Plan for help moving it into the room and confirm your frame can support the mattress and sleepers.
Signature Design by Ashley 12 Inch King: Best for medium foam feel
- 12-inch memory foam
- Medium feel
- Firm support foam base
- CertiPUR-US certified foam
Ashley pairs contouring memory foam with a firm support foam base in this 12-inch king mattress. Its stated feel is medium, which is a little softer than a medium firm target.
Pros
- Contouring memory foam
- Firm support foam base
- 10-year non-prorated warranty
Cons
- Stated feel is medium
Signature Design by Ashley offers a 12-inch king memory foam mattress with a medium feel and a firm support foam base. Its stated feel is slightly softer than medium firm, so it may fit if you want contouring without a firm surface.
The brand says the CertiPUR-US certified foam meets program standards for emissions, content and durability. Ashley includes a 10-year non-prorated warranty and says the mattress is compatible with an adjustable base.
The mattress is boxed for setup and should be allowed 48 hours to expand. Check the exact bed-frame and foundation requirements, since Ashley notes that buying a mattress and foundation from different brands may affect the warranty.
BedStory Medium Firm King Mattress: Best for zoned pocket springs
- 14-inch pocket spring hybrid
- Medium firm feel
- Zoned pressure relief
- 10-year warranty
This 14-inch hybrid uses individually wrapped pocket springs with comfort foam and zones for the shoulders, lumbar area and hips. BedStory states a 10-year warranty.
Pros
- Medium firm feel
- Zoned support
- 365-night trial
Cons
- Brand FAQ describes the feel as firm to extra firm
BedStory pairs comfort foam with individually wrapped pocket springs in a 14-inch king hybrid. The support zones target the shoulders, lumbar area, hips and lower back, while the knit cover and hybrid structure are designed to support airflow.
BedStory describes the mattress as medium firm, but its FAQ calls the feel firm to extra firm. That difference makes this a less certain choice if you're sensitive to firmness and should be weighed against the stated 365-night trial and 10-year warranty.
The mattress arrives compressed. BedStory says full expansion can take 48–72 hours, and suggests giving the mattress about 30 days for your body to adjust.
Grbsy 16 Inch King Size Mattress: Best for extra height and cushioning
- 16-inch hybrid
- Medium firm feel
- Seven-zone support
- Pocketed springs
This 16-inch hybrid combines a Euro-top, memory foam and pocketed springs with seven-zone support. Its taller profile calls for checking bed height and sheet fit.
Pros
- Taller 16-inch profile
- Seven-zone support
- 365-night trial
Cons
- May sit high on some bed frames
Grbsy is the tallest pick here at 16 inches, with a hybrid construction that combines a Euro-top, memory foams and pocketed springs. Its seven-zone layout is designed to provide different support across areas such as the shoulders, hips and lumbar region.
The brand describes this mattress as medium firm and says the pocket springs support motion isolation and reinforced edges. Grbsy also states a 365-night trial and 10-year warranty.
A 16-inch mattress can raise your bed considerably, so measure the full bed height and check fitted-sheet depth before choosing it. It suits buyers who want added cushioning and height, rather than those keeping a low bed profile.
How do you choose a medium firm king mattress?
Choose a medium firm king by matching the feel and support build to your sleep position, preferred height and bed frame. If you want a firmer queen, compare firm queen mattresses.
A medium firm label is a useful starting point, but foam and hybrid designs can feel different even when their labels match.
Is a medium firm mattress king size right for you?
A medium firm mattress king size can suit couples who want more room and a balanced surface. The size measures 76 x 80 inches for the models listed here, so check that your bedroom has enough floor space and room to move around the bed.
Side sleepers may prefer more cushioning at the shoulders and hips, while back and stomach sleepers often look for a steadier surface. Those are general preferences, not guarantees; your comfort and body shape matter.
If you need a different footprint, compare our guides to the best medium firm mattress full and the best medium firm mattress queen. For more options across sizes, see the best medium firm mattress picks.
Do foam and hybrid mattresses feel different?
Yes. Foam mattresses use layered foam, which may contour more closely, while hybrids combine foam with springs that can feel more responsive.
For example, Zinus and EGOHOME use all-foam construction, while the 12-inch Novilla and 14-inch UniPon combine foam with pocket springs. Consider how much contouring or spring response you prefer, and check the mattress's motion and edge support features if you share the bed.
How much mattress height should you choose?
Choose a height that works with your frame, sheets and preferred bed height. The picks here range from 12 to 16 inches, so a taller model can change how high you sit and how easy it is to get in and out of bed.
Measure the frame height and mattress together, then check the fitted sheet's pocket depth. A 16-inch mattress may need deeper sheets than a 12-inch model, and a tall mattress can cover more of a headboard.
Can a medium firm mattress go on an adjustable base?
Some mattresses are compatible with adjustable bases, but compatibility depends on the mattress design and the base. Ashley says its 12-inch memory foam mattress is compatible with an adjustable base.
For broader guidance, read Can a Firm Mattress Bend on an Adjustable Base? and confirm the requirements for your exact mattress and base combination before buying.
Which medium firm king mattress should you pick?
Choose the 12-inch Novilla hybrid if you want a medium firm feel with zoned pocket coils and edge stability. Pick the MLILY EGOHOME for a thicker all-foam option, or consider the UniPon when a 14-inch hybrid with extra lumbar foam suits your priorities.
If you'd rather have memory foam across a wider range of options, see our guide to the best memory foam mattress king. Before ordering, check bed height, frame compatibility and the trial or return terms that matter most to you.
Our score weighs specs, features and buyer feedback against what you're shopping for.
Our top 3 picks at a glance
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1
Best for a thicker foam feel
MLILY EGOHOME King 14 inch Memory Foam
9.7/10 our score
See it on Amazon -
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3
Frequently asked questions
What does medium firm feel like in a king mattress?
Medium firm usually means a balance of cushioning and support, though feel varies by brand and build. Foam may contour more closely, while pocketed coils can feel more responsive.
Compare the maker's stated feel and construction, then check the return terms in case the mattress feels softer or firmer than expected.
Is a medium firm king mattress good for back pain?
Some people with back pain prefer a medium firm surface, but comfort is personal and a mattress cannot promise to treat pain. Look for a feel and support layout that keep you comfortable in your usual sleeping position.
Talk with a doctor about ongoing pain or sleep problems.
Should I choose foam or a hybrid king mattress?
Choose foam if you want an all-foam build with contouring layers, such as the Zinus or EGOHOME models here. A hybrid pairs foam with pocketed coils, as in the Novilla and UniPon picks.
Compare mattress height, bed-frame compatibility and the feel you prefer before deciding.
Will a 14-inch king mattress fit my bed frame?
A 14-inch mattress can fit a standard king frame by footprint, but its height changes the total bed height. Measure the frame, headboard and fitted-sheet pocket depth before ordering.
Also check whether your frame is designed for the mattress type and support requirements.
