9 Best Memory Foam Mattress King (October 2026)
The best king memory foam mattresses include the Zinus Memory Foam 12 Inch Green Tea for layered foam comfort, the Signature Design by Ashley 12 Inch Hybrid for pocketed coil support, and the EGOHOME King Size Memory Foam Mattress for green tea gel foam.
On this page (5 sections)
The Zinus Memory Foam 12 Inch Green Tea is our top pick among king memory foam mattresses because its 3-inch memory foam layer sits above comfort and base foam layers. For a firmer feel, consider Nectar; for a hybrid with coils, look at Signature Design by Ashley.
King size gives two sleepers more width than a queen, but the larger footprint also makes frame fit and room clearance important. For options in the smaller size, compare queen memory foam mattresses.
The mattresses here are 12 or 14 inches tall, so check the full setup, including sheets and the path into your bedroom. For a compact mobile setup, compare memory foam RV mattresses.
Our picks at a glance
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1
-
2
Best for pocketed coil supportSignature Design by Ashley 12 Inch Hybrid
9.7/10 our score
See it on Amazon -
3
Best for green tea gel foamEGOHOME King Size Memory Foam Mattress
9.6/10 our score
See it on Amazon
- 4
Best for motion absorptionCheck it - 5
Best for a taller foam profileCheck it - 6
Check itSweetnight CoolNest 14 Inch King Size Mattress
Best for zoned cushioning - 7
Check itZinus 12 Inch King Cooling Essential Memory
Best for a medium feel - 8
Check itNectar 12” Memory Foam Mattress
Best for a firmer feel - 9
Check itNovilla AiryFlow Graphene 14 Inch King Size
Best for zoned lumbar support
Which king memory foam mattresses stand out?
The Zinus Green Tea has the clearest layer breakdown, while EGOHOME and Novilla offer gel-focused foam designs. The Ashley is the only hybrid in this group, so it adds pocketed coils rather than using an all-foam construction.
Zinus Memory Foam 12 Inch Green Tea: Best for layered foam comfort
- 12 in profile
- 3 in memory foam
- 2 in airflow-enhancing comfort foam
- 7 in high-density base foam
Three foam layers give this king mattress a clear balance of contouring and base support. Green tea and ActivCharcoal are infused into the memory foam.
Pros
- Three-part foam construction
- CertiPUR-US certified foam
- 10-year limited warranty
Cons
- Spot clean only
- May need up to 72 hours to regain its full shape
Signature Design by Ashley 12 Inch Hybrid: Best for pocketed coil support
- 12 in profile
- 360 individually wrapped coils
- Gel memory foam
- Two perimeter coil rows
This hybrid pairs gel memory foam and quilt foam with individually wrapped coils. It suits shoppers who want foam contouring with a coil support system.
Pros
- Pocketed coil construction
- Two perimeter coil rows
- Medium feel
Cons
- Not an all-foam mattress
- Foundation, box spring and frame are sold separately
EGOHOME King Size Memory Foam Mattress: Best for green tea gel foam
- 12 in profile
- Medium-firm feel
- Green tea gel infusion
- CertiPUR-US certified
A medium-firm feel and green tea gel infusion make this a straightforward choice for shoppers comparing king memory foam mattresses with cooling features.
Pros
- Memory foam construction
- Breathable bubble-hole structure
- 10-year warranty
Cons
- No foam layer measurements provided
- Allow time for setup and expansion
Novilla King Size Mattress: Best for motion absorption
- 12 in profile
- Three foam layers
- NanoGel memory foam
- Medium-plush feel
Novilla combines gel memory foam and comfort foam in a three-layer design. Its foam construction is described as absorbing noise and vibration from movement.
Pros
- Three foam layers
- CertiPUR-US certified foams
- 10-year protection
Cons
- Recommended to air out and reshape for 72 hours
- Medium-plush feel may not suit shoppers seeking a firm surface
EGOHOME 14 Inch King Mattress: Best for a taller foam profile
- 14 in profile
- Medium-firm feel
- Cooling green tea gel
- CertiPUR-US certified
This 14-inch EGOHOME uses memory foam with a green tea gel infusion. It offers a taller profile than the 12-inch models in this roundup.
Pros
- 14 in height
- Memory foam construction
- 10-year warranty
Cons
- No layer-by-layer measurements provided
- Check your bed frame and sheet depth for a 14 in mattress
Sweetnight CoolNest 14 Inch King Size Mattress: Best for zoned cushioning
- 14 in profile
- Five-zone support design
- PCM high-resilience foam
- Gel-infused memory foam
The CoolNest pairs PCM high-resilience foam with gel-infused memory foam and a five-zone design. It is a candidate for shoppers who want cooling features and zoned cushioning.
Pros
- Five-zone design
- Motion-absorbing foam layers
- 10-year protection
Cons
- Allow 72 hours for full expansion
- 14 in height needs deeper-fitting sheets
Zinus 12 Inch King Cooling Essential Memory: Best for a medium feel
- 12 in profile
- Cooling gel memory foam
- Medium feel
- Fiberglass-free construction
This Zinus uses cooling gel memory foam and has a medium feel. Its listed frame compatibility includes platform beds, box springs, slatted frames and adjustable bases.
Pros
- Medium feel
- CertiPUR-US certified foam
- 10-year limited warranty
Cons
- Allow 24–72 hours to fully expand
- Cooling performance can vary by sleeper and room
Nectar 12” Memory Foam Mattress: Best for a firmer feel
- 12 in profile
- Firm feel
- Contouring memory foam
- Dynamic support foam
Nectar describes this king mattress as firm, with breathable cooling fabric, contouring memory foam and dynamic support foam. It stands out for shoppers who prefer a firmer surface.
Pros
- Firm feel
- Three-layer sleep system
- Setup instructions say it is ready in 24 hours
Cons
- Firm feel may not suit those seeking a plush surface
- No foam layer measurements provided
Novilla AiryFlow Graphene 14 Inch King Size: Best for zoned lumbar support
- 14 in profile
- Three-zone foam support
- Graphene-infused cover
- Medium-firm feel
Novilla combines a graphene-infused cover, NanoGel memory foam and three-zone foam support. Its 14-inch profile and medium-firm feel suit shoppers who want a taller, zoned design.
Pros
- Three-zone support design
- Breathable mesh around the mattress
- 100-night trial and 10-year protection
Cons
- Less buyer feedback than several other picks
- 14 in height needs compatible sheets and frame clearance
| Product | Best for | Height | Feel | Construction | Our score |
|---|---|---|---|---|---|
| Zinus Memory Foam 12 Inch Green Tea | layered foam comfort | 12 in | Medium firm | Memory foam | 9.7 |
| Signature Design by Ashley 12 Inch Hybrid | pocketed coil support | 12 in | Medium | Hybrid with pocketed coils | 9.7 |
| EGOHOME King Size Memory Foam Mattress | green tea gel foam | 12 in | Medium firm | Memory foam | 9.6 |
| Novilla King Size Mattress | motion absorption | 12 in | Medium plush | Gel memory foam | 9.5 |
| EGOHOME 14 Inch King Mattress | a taller foam profile | 14 in | Medium firm | Memory foam | 9.4 |
| Sweetnight CoolNest 14 Inch King Size Mattress | zoned cushioning | 14 in | Medium | Memory foam | 9.2 |
| Zinus 12 Inch King Cooling Essential Memory | a medium feel | 12 in | Medium | Memory foam | 9.1 |
| Nectar 12” Memory Foam Mattress | a firmer feel | 12 in | Firm | Memory foam | 8.7 |
| Novilla AiryFlow Graphene 14 Inch King Size | zoned lumbar support | 14 in | Medium firm | Memory foam | 8.2 |
How we chose king memory foam mattresses
We compared construction, stated feel, height, comfort materials, frame compatibility and setup notes.
Our score weighs specs, features and buyer feedback against what you’re shopping for. We did not test these mattresses in person.
If you want to compare foam types and firmness labels before choosing, start with What to Look for in a Memory Foam Mattress: 7 Specs. The guide can help you decide which details matter most for your room and sleep preferences.
Best king memory foam mattresses by need
These picks cover different priorities, from a layered all-foam design to zoned support and a firmer feel. For another brand and a wider range of profiles, see Lucid memory foam mattresses.
Match the feature to your main need, then check height and frame fit before ordering.
1. Zinus Memory Foam 12 Inch Green Tea: Best for layered foam comfort
Zinus Memory Foam 12 Inch Green Tea: Best for layered foam comfort
- 12 in profile
- 3 in memory foam
- 2 in airflow-enhancing comfort foam
- 7 in high-density base foam
Three foam layers give this king mattress a clear balance of contouring and base support. Green tea and ActivCharcoal are infused into the memory foam.
Pros
- Three-part foam construction
- CertiPUR-US certified foam
- 10-year limited warranty
Cons
- Spot clean only
- May need up to 72 hours to regain its full shape
Zinus Green Tea gives you a defined three-part build: 3 inches of conforming memory foam, 2 inches of airflow-enhancing comfort foam and 7 inches of high-density base foam. That breakdown makes it easier to compare than models without layer measurements.
The mattress has a medium-firm feel and includes green tea and ActivCharcoal in the memory foam. Zinus says the design is intended to help manage moisture and maintain freshness, while open air pockets in the middle foam layer encourage airflow.
The foam is CertiPUR-US certified. You can read about the certification program at CertiPUR-US, then consider whether the mattress’s height and feel match your bed setup.
Plan for up to 72 hours for the mattress to regain its full shape. Zinus also advises spot cleaning, so use a protector if you want a removable barrier between the surface and spills.
2. Signature Design by Ashley 12 Inch Hybrid: Best for pocketed coil support
Signature Design by Ashley 12 Inch Hybrid: Best for pocketed coil support
- 12 in profile
- 360 individually wrapped coils
- Gel memory foam
- Two perimeter coil rows
This hybrid pairs gel memory foam and quilt foam with individually wrapped coils. It suits shoppers who want foam contouring with a coil support system.
Pros
- Pocketed coil construction
- Two perimeter coil rows
- Medium feel
Cons
- Not an all-foam mattress
- Foundation, box spring and frame are sold separately
The Ashley is the hybrid choice in this roundup, combining gel memory foam, quilt foam and 360 individually wrapped coils. Two perimeter rows are included for edge support, while the individually wrapped coil design is described as reducing motion transfer.
Its stated feel is medium, and its 12-inch height is close to the all-foam options here. The king measures 76 x 79.5 x 12 inches, slightly shorter than the 80-inch length listed for most other picks.
This is a useful option if you want memory foam in the comfort layers but prefer coils beneath them. The foundation, box spring and frame are sold separately, so include those pieces in your setup plan.
3. EGOHOME King Size Memory Foam Mattress: Best for green tea gel foam
EGOHOME King Size Memory Foam Mattress: Best for green tea gel foam
- 12 in profile
- Medium-firm feel
- Green tea gel infusion
- CertiPUR-US certified
A medium-firm feel and green tea gel infusion make this a straightforward choice for shoppers comparing king memory foam mattresses with cooling features.
Pros
- Memory foam construction
- Breathable bubble-hole structure
- 10-year warranty
Cons
- No foam layer measurements provided
- Allow time for setup and expansion
EGOHOME’s 12-inch king mattress combines memory foam with a green tea gel infusion and a medium-firm feel. The brand describes a bubble-hole structure intended to support airflow, though cooling comfort can vary with room conditions and personal preference.
The mattress is made with memory foam and is CertiPUR-US certified. EGOHOME also states that the mattress and cover are OEKO-TEX certified; the OEKO-TEX label overview explains the Standard 100 label.
Choose this model if you want a medium-firm all-foam option with an emphasis on cooling features. Compare it with the taller 14-inch EGOHOME below if a deeper profile is a priority.
4. Novilla King Size Mattress: Best for motion absorption
Novilla King Size Mattress: Best for motion absorption
- 12 in profile
- Three foam layers
- NanoGel memory foam
- Medium-plush feel
Novilla combines gel memory foam and comfort foam in a three-layer design. Its foam construction is described as absorbing noise and vibration from movement.
Pros
- Three foam layers
- CertiPUR-US certified foams
- 10-year protection
Cons
- Recommended to air out and reshape for 72 hours
- Medium-plush feel may not suit shoppers seeking a firm surface
Novilla uses three foam layers, including gel memory foam and high-density foam, in a 12-inch profile. Its listed feel is medium plush, which may appeal if you want a softer surface than the medium-firm picks.
The brand describes the layers as absorbing noise and vibration from sleep movements. That feature may matter when sharing a bed, though no foam mattress can guarantee that you will not notice a partner moving.
Novilla says its foams are CertiPUR-US certified and its cover is OEKO-TEX Standard 100 certified. The mattress is compressed for delivery, and Novilla recommends allowing 72 hours to air out and reshape.
5. EGOHOME 14 Inch King Mattress: Best for a taller foam profile
EGOHOME 14 Inch King Mattress: Best for a taller foam profile
- 14 in profile
- Medium-firm feel
- Cooling green tea gel
- CertiPUR-US certified
This 14-inch EGOHOME uses memory foam with a green tea gel infusion. It offers a taller profile than the 12-inch models in this roundup.
Pros
- 14 in height
- Memory foam construction
- 10-year warranty
Cons
- No layer-by-layer measurements provided
- Check your bed frame and sheet depth for a 14 in mattress
This EGOHOME shares a medium-firm feel and green tea gel memory foam approach with the 12-inch version, but stands 14 inches tall. The extra height changes how the mattress sits on your frame and can affect fitted-sheet fit.
The maker describes the foam as pressure-relieving and breathable. Those are comfort claims rather than guarantees, so consider the stated materials and feel alongside your own preferences.
Check your bed’s overall height before choosing a 14-inch mattress. A taller mattress can make it harder to sit at the edge or reach the floor, depending on the frame and foundation.
6. Sweetnight CoolNest 14 Inch King Size Mattress: Best for zoned cushioning
Sweetnight CoolNest 14 Inch King Size Mattress: Best for zoned cushioning
- 14 in profile
- Five-zone support design
- PCM high-resilience foam
- Gel-infused memory foam
The CoolNest pairs PCM high-resilience foam with gel-infused memory foam and a five-zone design. It is a candidate for shoppers who want cooling features and zoned cushioning.
Pros
- Five-zone design
- Motion-absorbing foam layers
- 10-year protection
Cons
- Allow 72 hours for full expansion
- 14 in height needs deeper-fitting sheets
Sweetnight’s 14-inch CoolNest pairs PCM high-resilience foam with gel-infused memory foam. Its five-zone design is intended to cushion pressure areas while maintaining stable support.
The brand also describes a breathable cover and foam structure designed to promote airflow. These features are aimed at a cooler sleep surface, but temperature comfort is personal and can depend on bedding, room temperature and sleepwear.
This is a fit for shoppers who want a taller mattress with a medium feel and zoned construction. Sweetnight says the mattress is compressed in a box and should be given 72 hours to fully expand.
7. Zinus 12 Inch King Cooling Essential Memory: Best for a medium feel
Zinus 12 Inch King Cooling Essential Memory: Best for a medium feel
- 12 in profile
- Cooling gel memory foam
- Medium feel
- Fiberglass-free construction
This Zinus uses cooling gel memory foam and has a medium feel. Its listed frame compatibility includes platform beds, box springs, slatted frames and adjustable bases.
Pros
- Medium feel
- CertiPUR-US certified foam
- 10-year limited warranty
Cons
- Allow 24–72 hours to fully expand
- Cooling performance can vary by sleeper and room
Zinus Cooling Essential has a medium feel and uses cooling gel memory foam. The brand says the gel pulls heat away from the body, and the foam contours to cushion pressure points around the shoulders, hips and joints.
Its stated frame compatibility includes platform beds, box springs, slatted frames and adjustable bases. The foam is CertiPUR-US certified, and the cover is OEKO-TEX Standard 100 certified.
This model may suit shoppers looking for a balanced feel rather than a firm or plush surface. If you’re unsure how a medium feel compares with medium-firm, check the firmness descriptions and comfort-layer details in our full memory foam mattress picks.
8. Nectar 12” Memory Foam Mattress: Best for a firmer feel
Nectar 12” Memory Foam Mattress: Best for a firmer feel
- 12 in profile
- Firm feel
- Contouring memory foam
- Dynamic support foam
Nectar describes this king mattress as firm, with breathable cooling fabric, contouring memory foam and dynamic support foam. It stands out for shoppers who prefer a firmer surface.
Pros
- Firm feel
- Three-layer sleep system
- Setup instructions say it is ready in 24 hours
Cons
- Firm feel may not suit those seeking a plush surface
- No foam layer measurements provided
Nectar describes this 12-inch mattress as firm, with breathable cooling fabric, contouring memory foam and dynamic support foam. That makes it the firmest option in this roundup by its stated feel.
The foam layers are designed to contour around the body, but comfort is individual. If you prefer a softer surface or more sink, a medium or medium-plush model may be a better match.
Nectar’s setup directions say to unbox and unroll the mattress, then allow it to expand. Consider the firm feel carefully if you sleep mostly on your side or prefer a cushioned top.
9. Novilla AiryFlow Graphene 14 Inch King Size: Best for zoned lumbar support
Novilla AiryFlow Graphene 14 Inch King Size: Best for zoned lumbar support
- 14 in profile
- Three-zone foam support
- Graphene-infused cover
- Medium-firm feel
Novilla combines a graphene-infused cover, NanoGel memory foam and three-zone foam support. Its 14-inch profile and medium-firm feel suit shoppers who want a taller, zoned design.
Pros
- Three-zone support design
- Breathable mesh around the mattress
- 100-night trial and 10-year protection
Cons
- Less buyer feedback than several other picks
- 14 in height needs compatible sheets and frame clearance
Novilla AiryFlow combines a graphene-infused cover with NanoGel memory foam and a three-zone foam structure. The zones are designed with softer shoulder areas, a reinforced lumbar core and contoured hip sections.
The mattress has a medium-firm feel and a 14-inch profile. Novilla also describes its breathable mesh and foam layers as helping manage heat and motion, but these features do not ensure the same result for every sleeper.
This is the most specialized option here for shoppers who want zoned support and a taller design. Compare the setup with your frame and sheets before buying, and weigh the less extensive buyer feedback against the model’s feature list.
What should you compare before choosing a king foam mattress?
Start with feel, construction and height, because those details shape how the mattress fits your body and room. Then check dimensions, frame support and setup instructions.
Does the foam feel match your sleep position?
A medium or medium-firm mattress can be a sensible place to start if you want a balance of cushioning and support. A firm feel may suit shoppers who like less sink, while medium-plush can feel softer under the body.
These labels are not a shared scale across brands, so treat them as a starting point. If you have ongoing pain or sleep problems, ask a health professional for guidance.
Is all-foam or hybrid construction right for you?
An all-foam mattress uses foam layers for its comfort and support structure. A hybrid combines foam with coils, as the Ashley does, which may appeal if you want contouring foam and a coil-based support system.
The Ashley is the only coil hybrid here. For an all-foam design with a clear layer breakdown, Zinus Green Tea is the most detailed pick.
Will the mattress height work with your frame and bedding?
The picks range from 12 to 14 inches tall. Measure your current frame and bedding, and check that fitted sheets can cover the mattress depth.
If you want a thinner option for a lower bed height or a specific setup, compare our best 6 inch memory foam mattress guide. For the in-a-box delivery format, see best memory foam mattress in a box king.
Do king dimensions fit your room?
Most mattresses in this roundup measure 76 x 80 inches, while the Ashley measures 76 x 79.5 inches. Check the interior dimensions of your frame, plus the clearance around the bed for walking and opening drawers.
A king also needs bedding that fits its wider surface. If you’re replacing pillows too, our what size is a king pillow guide explains the standard pillow dimensions.
What care and setup details matter?
Foam mattresses arrive compressed in a box, and expansion times differ. Follow the brand’s directions and avoid putting on bedding until the mattress has reached the recommended shape.
Use a mattress protector that fits the mattress depth and can be cleaned according to its care label. This is especially useful if the mattress itself only allows spot cleaning.
Which king memory foam mattress should you choose?
Choose Zinus Green Tea if you want the clearest layer breakdown and a medium-firm feel. Pick the Ashley if you want a hybrid with individually wrapped coils, or choose Nectar if you prefer a firm memory foam surface.
For a taller mattress, compare the EGOHOME, Sweetnight and Novilla 14-inch options by their feel and support features. Before deciding, check your frame dimensions, sheet depth and room clearance so your king memory foam mattress fits the whole setup.
Our top 3 picks at a glance
-
1
-
2
Best for pocketed coil support
Signature Design by Ashley 12 Inch Hybrid
9.7/10 our score
See it on Amazon -
3
Best for green tea gel foam
EGOHOME King Size Memory Foam Mattress
9.6/10 our score
See it on Amazon
Frequently asked questions
What size is a king memory foam mattress?
A standard king is commonly 76 x 80 in, and the king mattresses here use those dimensions. Check the exact size of your bed frame before buying because some frames may have different interior measurements.
Also measure doorways and stairs if you need to carry the mattress through tight spaces.
Is medium-firm a good feel for a king memory foam mattress?
Medium-firm can suit sleepers who want cushioning without a very plush feel, but comfort depends on body shape and sleep position. These picks include medium, medium-plush and firm options, so compare the stated feel before choosing.
Ongoing pain or sleep problems are a reason to speak with a health professional.
Does a king memory foam mattress need a special bed frame?
Many foam mattresses work with platform beds or slatted bases, but compatibility depends on the model. Zinus Cooling Essential names platform beds, box springs, slatted frames and adjustable bases as compatible options.
Check the frame maker's support and spacing guidance as well.
How long should a king foam mattress expand?
Expansion time varies by model and room temperature. Zinus Green Tea says to allow 24–72 hours, while Novilla recommends 72 hours to air out and reshape.
Follow the setup directions for your specific mattress, and plan for the waiting time before you need the bed.
How do you protect a memory foam mattress?
A fitted mattress protector can help shield the surface from spills and everyday wear. Choose one that fits the mattress height, especially for a 14-inch model, and check that its fabric does not make the sleep surface feel warmer than you like.
Read our mattress protector guide for fit and material considerations.
