9 Best King Size Memory Foam Mattresses (November 2026)
The best king size memory foam mattresses include the Zinus Memory Foam 12 Inch Green Tea for green tea infused foam, the Signature Design by Ashley 12 Inch Hybrid for pocketed coil support, and the EGOHOME King Size Memory Foam Mattress for medium firm contouring.
On this page (5 sections)
The best memory foam mattress king size depends on the feel and height you want. Our top pick is the Zinus Green Tea for its layered foam construction, while the Ashley hybrid is an option if you want pocketed coils alongside memory foam.
A king mattress offers a broad shared sleep surface, so motion control and edge support can matter for couples. Decide whether you want the close contour of all-foam construction or the more responsive feel of a hybrid, then compare firmness and total bed height.
If you're still deciding which mattress to buy, start with sleep position and preferred feel. Our broader guide to the best memory foam mattress explains the main tradeoffs across sizes.
Our picks at a glance
-
1
Best for green tea infused foamZinus Memory Foam 12 Inch Green Tea
9.5/10 our score
See it on Amazon -
2
Best for pocketed coil supportSignature Design by Ashley 12 Inch Hybrid
9.4/10 our score
See it on Amazon -
3
Best for medium firm contouringEGOHOME King Size Memory Foam Mattress
9.3/10 our score
See it on Amazon
- 4
Check itZinus 12 Inch King Cooling Essential Memory
Best for a medium feel - 5
Best for a taller foam profileCheck it - 6
Check itCOOL GEL Chill Memory Foam 14-Inch Mattress
Best for a firm 14-inch feel - 7
Best for gel foam and motion absorptionCheck it - 8
Check itNectar 12” Memory Foam Mattress
Best for a firm feel - 9
Check itSweetnight CoolNest 14 Inch King Size Mattress
Best for zoned pressure cushioning
Which king size memory foam mattresses stand out?
The Zinus Green Tea leads this group with a 12-inch layered foam build, while the other options add cooling features, taller profiles or coil support. We compared each pick's size, construction, stated feel and features against what king mattress shoppers tend to need.
Zinus Memory Foam 12 Inch Green Tea: Best for green tea infused foam
- 12 in profile
- 3 in memory foam layer
- Green tea and ActivCharcoal infused foam
- Medium firm feel
This 12-inch king mattress combines memory foam with a softer airflow enhancing foam layer and a high-density support base. Green tea and ActivCharcoal are infused into the foam.
Pros
- Three foam layers
- CertiPUR-US certified foam
- 10-year limited warranty
Cons
- Spot clean only
- Needs time to expand after unboxing
Signature Design by Ashley 12 Inch Hybrid: Best for pocketed coil support
- 12 in profile
- 360 individually wrapped coils
- Gel memory foam
- Medium feel
This hybrid pairs gel memory foam and quilt foam with individually wrapped coils. It offers a different feel from an all-foam mattress while retaining foam comfort layers.
Pros
- Pocketed coils
- Two perimeter rows for edge support
- Low motion transfer feature
Cons
- Foundation, box spring and frame sold separately
- Allow 48 hours to expand
EGOHOME King Size Memory Foam Mattress: Best for medium firm contouring
- 12 in profile
- Green tea gel foam
- Medium firm feel
- CertiPUR-US certified
EGOHOME describes this 12-inch mattress as medium firm, with memory foam intended to contour to the body. Its green tea gel and breathable foam structure are designed to support a cooler feel.
Pros
- King dimensions
- Pressure-relief foam
- 10-year warranty
Cons
- Allow time for a boxed mattress to expand
- Cooling is a brand-described feature
Zinus 12 Inch King Cooling Essential Memory: Best for a medium feel
- 12 in profile
- Cooling gel memory foam
- Medium feel
- Compatible with adjustable bases
The Cooling Essential combines gel memory foam with a breathable cover and a medium feel. Zinus says the foam cushions pressure points and absorbs motion.
Pros
- Works with platform, slatted and adjustable bases
- CertiPUR-US certified foam
- 10-year limited warranty
Cons
- Allow 24–72 hours to expand
- King supports up to 500 lb
EGOHOME 14 Inch King Mattress: Best for a taller foam profile
- 14 in profile
- Green tea gel memory foam
- Medium firm feel
- CertiPUR-US certified
This 14-inch king mattress gives you a taller foam profile than the 12-inch choices. EGOHOME describes its foam as pressure relieving and breathable.
Pros
- 14 in height
- Green tea gel foam
- 10-year warranty
Cons
- Extra height can affect fitted sheet depth
- Allow room for box expansion
COOL GEL Chill Memory Foam 14-Inch Mattress: Best for a firm 14-inch feel
- 14 in profile
- Cooling gel memory foam
- Firm feel
- Includes 2 pillows
The Chill has a 14-inch profile and a firm feel, with gel memory foam layers. It also comes with 2 pillows, according to the included components.
Pros
- 14 in profile
- CertiPUR-US certified foam
- Compatible with adjustable bases
Cons
- Firm feel may not suit those seeking a plush surface
- Allow up to 72 hours to expand
Novilla King Size Mattress: Best for gel foam and motion absorption
- 12 in profile
- Gel memory foam
- Three foam layers
- Medium plush feel
Novilla combines gel memory foam with comfort and high-density foam in a 12-inch profile. The maker describes the layers as absorbing noise and vibration from sleep movements.
Pros
- CertiPUR-US certified foams
- OEKO-TEX Standard 100 certified cover
- 10-year protection
Cons
- Allow 72 hours to air out and reshape
- Medium plush may feel softer than medium firm
Nectar 12” Memory Foam Mattress: Best for a firm feel
- 12 in profile
- Firm feel
- Contouring memory foam
- Breathable cooling fabric
Nectar describes this king mattress as firm, with contouring foam and dynamic support foam. It may suit shoppers who want a firmer surface with some cushioning.
Pros
- 12 in profile
- Breathable cooling fabric
- Nectar describes a 365-night trial
Cons
- Firm feel may not suit side sleepers who prefer more cushion
- Trial terms should be checked before buying
Sweetnight CoolNest 14 Inch King Size Mattress: Best for zoned pressure cushioning
- 14 in profile
- 5-zone support design
- PCM and gel memory foam
- Medium feel
The CoolNest uses a 5-zone design and layers of memory foam for pressure cushioning and motion absorption. Its 14-inch height is the tallest among the 14-inch choices.
Pros
- 5-zone support design
- CertiPUR-US certified foams
- 10-year protection
Cons
- Allow 72 hours to expand
- Confirm cover certification details before purchase
How we chose these king memory foam mattresses
We compared the stated dimensions, foam construction, firmness descriptions and practical features such as cooling materials, motion absorption and setup guidance.
Our score weighs specs, features and buyer feedback against what you're shopping for. Product names and features are included to help you compare, but comfort depends on your body, sleep position and preferences.
Compare king memory foam mattress features
The main differences are construction, profile and stated feel. Use this table to narrow the choices, then check your bed height, frame and sheet fit.
| Product | Best for | Size | Construction | Feel | Our score |
|---|---|---|---|---|---|
| Zinus Memory Foam 12 Inch Green Tea | green tea infused foam | King, 80 x 76 x 12 in | Memory foam | Medium firm | 9.5 |
| Signature Design by Ashley 12 Inch Hybrid | pocketed coil support | King, 79.5 x 76 x 12 in | Hybrid with pocketed coils | Medium | 9.4 |
| EGOHOME King Size Memory Foam Mattress | medium firm contouring | King, 80 x 76 x 12 in | Memory foam | Medium firm | 9.3 |
| Zinus 12 Inch King Cooling Essential Memory | a medium feel | King, 80 x 76 x 12 in | Memory foam | Medium | 9.3 |
| EGOHOME 14 Inch King Mattress | a taller foam profile | King, 80 x 76 x 14 in | Memory foam | Medium firm | 9.2 |
| COOL GEL Chill Memory Foam 14-Inch Mattress | a firm 14-inch feel | King, 80 x 76 x 14 in | Gel memory foam | Firm | 9.1 |
| Novilla King Size Mattress | gel foam and motion absorption | King, 80 x 76 x 12 in | Memory foam | Medium plush | 8.8 |
| Nectar 12” Memory Foam Mattress | a firm feel | King, 80 x 76 x 12 in | Memory foam | Firm | 8.7 |
| Sweetnight CoolNest 14 Inch King Size Mattress | zoned pressure cushioning | King, 80 x 76 x 14 in | Memory foam | Medium | 8.5 |
What should you check before choosing a king foam mattress?
A king size memory foam mattress should fit your frame, your preferred feel and the height you want getting in and out of bed. Check those basics before choosing a cooling feature or extra foam layer.
How does firmness affect a king memory foam mattress?
Firmness labels help narrow your options, but they are not a universal scale. These picks range from firm to medium plush, so use the maker's description as a starting point and consider your usual sleep position.
Side sleepers often look for more cushioning around shoulders and hips, while back and stomach sleepers may prefer a firmer surface. These are general preferences, not rules.
If you have ongoing pain or sleep problems, ask a doctor for guidance.
Will a 12-inch or 14-inch mattress fit your bed?
A 12-inch mattress can keep your bed height lower than a 14-inch model, but the full setup determines the final height. Add the mattress, foundation and frame measurements before you buy.
A taller mattress may also need deeper fitted sheets. Confirm the pocket depth of your sheets and leave room for headboards, footboards or nearby furniture.
Do cooling features matter in a king foam mattress?
Cooling features may be worth comparing if you tend to sleep warm, but they do not guarantee a particular temperature. The picks use features such as gel memory foam, breathable covers or airflow-focused foam layers.
Look at the full construction and your bedding, too. Heavy blankets, mattress protectors and room temperature also affect how warm the bed feels.
How much motion isolation do you need?
Memory foam can absorb some movement across the sleep surface, which may help couples who wake when a partner shifts. Models describe motion absorption differently, so compare their specific foam layers and construction.
The Ashley is a hybrid with individually wrapped coils and foam comfort layers. If you want to understand the all-foam tradeoff, compare it with our best full size memory foam mattress guide and best twin XL memory foam mattress picks.
Can you use a king foam mattress on an adjustable base?
Some foam mattresses are designed to work with adjustable bases, but compatibility varies by model. Check the mattress and base instructions together, including any limits on frame style or support.
Our guides explain what mattresses work with adjustable bases and whether a foam mattress can go on an adjustable base. The Zinus Cooling Essential and COOL GEL Chill both specify adjustable-base compatibility.
Which king memory foam mattress should you choose?
Choose the Zinus Green Tea if you want layered foam with green tea and ActivCharcoal, and pick the Cooling Essential if a medium feel and stated adjustable-base compatibility matter most. Choose EGOHOME for a 14-inch profile, Nectar for a firm feel, or Ashley if you want memory foam over pocketed coils.
If you're deciding between brands, our guide to the best Zinus memory foam mattress covers that line in more detail. Compare your frame dimensions, fitted sheet depth and preferred firmness before choosing a king size memory foam mattress.
Our top 3 picks at a glance
-
1
Best for green tea infused foam
Zinus Memory Foam 12 Inch Green Tea
9.5/10 our score
See it on Amazon -
2
Best for pocketed coil support
Signature Design by Ashley 12 Inch Hybrid
9.4/10 our score
See it on Amazon -
3
Best for medium firm contouring
EGOHOME King Size Memory Foam Mattress
9.3/10 our score
See it on Amazon
Frequently asked questions
What size is a king memory foam mattress?
A standard king mattress is about 80 x 76 in. Check your bed frame’s interior dimensions before choosing, since frame styles and product dimensions can vary.
Also measure doorways, stairs and turns along the delivery path for a boxed mattress.
Is memory foam good for a king bed?
Memory foam can suit a king bed if you want body contouring and motion absorption across a wide sleep surface. A king size gives each sleeper more room, while foam can help limit movement transfer between sides.
Feel, firmness and temperature comfort vary by model and sleeper.
What thickness should I choose for a king memory foam mattress?
Choose a thickness that fits your bed height, sheets and preferred feel. These picks range from 12 to 14 in, and a thicker mattress can raise the sleep surface.
Measure the frame and foundation with your current bedding before deciding.
Does a king memory foam mattress work with an adjustable base?
Some foam mattresses work with adjustable bases, but compatibility depends on the mattress and base. Zinus says its Cooling Essential is compatible with adjustable bases, and COOL GEL also names adjustable bases as compatible.
Check your frame and mattress requirements together before buying.
See our guide to foam mattresses on adjustable bases.
How do I choose between 12 and 14 inches?
A 12-inch profile may fit more easily with existing sheets and a lower bed height, while 14 inches gives you a taller mattress. Add the mattress, foundation and frame heights to estimate how high you'll sit and whether your fitted sheets will fit.
Check the manufacturer's expansion instructions after delivery.
