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Best King Mattress

When sharing the bed with a partner, pet, or kids, individuals still need space to spread out and sleep comfortably. A king size mattress offers couples and families plenty of space. Since shoppers who are considering a king size mattress are often sharing the bed, they’ll need to consider how well the mattress isolates motion. They’ll also need to cater to different sleeping positions and body types.

A king size mattress can be an investment, and shoppers will want to factor in the added expense of bedding and accessories. Bedroom size and layout are important factors to keep in mind as well, and a king size bed is often a good fit for a large master bedroom or guest room.

We’ll take a closer look at the best king size mattresses on the market, including how each mattress performs in key categories like motion isolation and pressure relief. We’ll also break down the differences between a king size mattress and a California king and other factors for shoppers to understand prior to making a purchase.

Our Top Picks

Nectar Mattress - Editor's Pick
    • Mattress Type: Foam
    • Firmness Level: Medium Firm (6)
    • Price (King): $999
Helix Midnight - Best Hybrid
    • Mattress Type: Hybrid
    • Firmness Level: Medium Firm (6)
    • Price (King): $1,249
Layla Hybrid - Best Flippable Hybrid
    • Mattress Type: Hybrid
    • Firmness Level: Medium Soft (4), Medium Firm (7)
    • Price (King): $1,849
MemoryLux - Best Memory Foam
    • Mattress Type: Foam
    • Firmness Level: Medium Soft (4), Medium (5), Firm (7)
    • Price (King): $1,799
Birch - Best Latex Hybrid
    • Mattress Type: Hybrid
    • Firmness Level: Medium Firm (6)
    • Price (King): $1,799
Brooklyn Bedding Aurora - Best Cooling
    • Mattress Type: Hybrid
    • Firmness Level: Medium Soft (4), Medium Firm (6), Firm (7)
    • Price (Twin): $2,124

Nectar - Editor's Pick

Price (King): $999

Height: 11"

Firmness: Medium Firm (6)

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Pressure Point Relief: 4/5

Sleeps Cool: 2/5

Motion Isolation: 4/5

Edge Support: 3/5

Durability: 3/5

Ease of Movement: 3/5

Sex: 3/5

Off-Gassing: 3/5

nectar-mattress

Highlights:

  • Top-notch motion isolation
  • Tencel cover wicks away moisture
  • 365-night sleep trial and lifetime warranty

Ideal For:

  • Sleepers who share the bed with a partner or pet
  • Value-minded shoppers
  • All sleeping positions (side, back, stomach, and combination)

The Nectar Mattress isolates motion exceptionally well, making it a strong option for those who share the bed. The all-foam construction provides standout pressure relief for a variety of sleeping positions and body types.

The cover is made of Tencel, a breathable long-staple fiber that wicks away moisture. The cover is quilted with gel-infused memory foam to help draw heat away from the body, though there is still the possibility of heat retention in the foam layers. A 3-inch comfort layer of gel-infused memory foam cushions pressure points without restricting movement or letting sleepers sink in too deeply. This is beneficial for combination sleepers who change positions throughout the night.

A 1.75-inch layer of Adaptive Hi Core memory foam sits beneath the comfort system to help keep the spine aligned. The 5.25-inch high-density polyfoam support core reinforces the memory foam layers and prevents sagging over time.

The mattress is medium firm (6), so it balances softness and support for sleepers. The high-density foam base offers solid edge support for a memory foam mattress, meaning sleepers can spread out even more on a king size mattress.

The competitive price point is ideal for shoppers looking for a great value on a king size mattress. Nectar backs the bed with a 365-night sleep trial and a forever warranty.

Read Our Full Nectar Mattress Review


Helix Midnight - Best Hybrid

Price (King): $1,249

Height: 12"

Firmness: Medium Firm (6)

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Pressure Point Relief: 4/5

Sleeps Cool: 3/5

Motion Isolation: 3/5

Edge Support: 3/5

Durability: 3/5

Ease of Movement: 3/5

Sex: 3/5

Off-Gassing: 3/5

Helix Midnight Mattress

Highlights:

  • Coils add ample bounce and airflow
  • Foam comfort layers cushion pressure points
  • Full-body contouring without sinking in too deeply

Ideal For:

  • Couples
  • Side and back sleepers who weigh less than 230 pounds
  • Sleepers with sharp pressure points or joint pain

Helix offers a variety of hybrid mattresses, each designed with a specific sleeping position and comfort preference in mind. The Helix Midnight has a medium firm (6) rating and foam comfort layers that are especially beneficial for side sleepers. That said, we’ve also found it to be a good fit for back sleepers.

Couples sharing a king size Helix Midnight will find that the mattress balances ease of movement and motion isolation. The Memory Plus Foam comfort layer relieves pressure and helps absorb movements.

A transition layer of polyfoam prevents sinking in too deeply, while the pocketed coil base reduces motion transfer and offers edge support. A base layer of dense polyfoam reinforces the coils and provides additional support.

The mattress cradles the body and helps keep the spine aligned. The Helix Midnight has a breathable polyester cover, though shoppers can choose to upgrade to the Midnight Luxe model that comes with a Tencel cover and additional pillow top.

Helix offers a 100-night sleep trial, which includes a 30-night break-in period before a return can be initiated. The Helix Midnight is covered by a 10-year limited warranty.

Read Our Full Helix Mattress Review


Layla Hybrid - Best Flippable Hybrid

Price (King): $1,849

Height: 13"

Firmness: Medium Soft (4), Firm (7)

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Pressure Point Relief: 4/5 (Medium Soft), 3/5 (Firm)

Sleeps Cool: 3/5 (Medium Soft), 4/5 (Firm)

Motion Isolation: 4/5 (Medium Soft), 3/5 (Firm)

Edge Support: 4/5

Durability: 3/5

Ease of Movement: 3/5 (Medium Soft), 4/5 (Firm)

Sex: 3/5 (Medium Soft), 4/5 (Firm)

Off-Gassing: 3/5

Highlights:

  • Copper-infused foam helps prevent heat retention
  • Reversible construction with two firmness levels
  • Zoned polyfoam layer for spinal support

Ideal For:

  • Hot sleepers
  • Sleepers who want to try two firmness levels in one
  • Side sleepers and those who value motion isolation (medium soft side)
  • Sleepers who weigh more than 130 pounds (firm side)

The Layla Hybrid stands out with a flippable construction and a different firmness level on each side. Shoppers who are uncertain which mattress firmness they need, or sleepers whose needs may change, will benefit from having two firmness options available.

The polyester blend cover includes a tag that indicates which side is which, while vinyl handles make it easier to move and flip the mattress. Both sides have a comfort layer of copper-infused memory foam above a layer of TriZone Airflow polyfoam, but the layers differ in firmness and thickness.

The medium soft (4) side of the Layla Hybrid has 2.5 inches of copper-infused memory foam with a plush, conforming feel that evenly distributes body weight. The copper infusion helps draw heat away from the body while preventing the buildup of bacteria and odors. The 2-inch layer of TriZone Airflow foam is zoned for spinal support. The channels in this layer add airflow throughout the mattress and dissipate heat.

The firm (7) side has 1 inch of copper-infused memory foam and a 1.5 inches of TriZone Airflow foam. This firm and supportive side is best for sleepers who weigh more than 130 pounds.

The 6-inch pocketed coil support core reduces motion transfer while increasing airflow throughout the mattress. A double coil perimeter provides sturdy edge support.

Layla offers a 120-night sleep trial and 10-year warranty for the Layla Hybrid.


MemoryLux - Best Memory Foam

Price (King): $1,799

Height: 11”

Firmness: Medium Soft (4), Medium (5), Firm (7-8)

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Pressure Point Relief: 4/5

Sleeps Cool: 3/5

Motion Isolation: 4/5 (Medium Soft, Medium), 3/5 (Firm)

Edge Support: 2/5 (Medium Soft), 3/5 (Medium, Firm)

Durability: 3/5

Ease of Movement: 2/5 (Medium Soft), 3/5 (Medium, Firm)

Sex: 2/5 (Medium Soft), 3/5 (Medium, Firm)

Off-Gassing: 3/5

Winkbeds Memorylux Mattress

Highlights:

  • AirCell memory foam relieves pressure
  • Three firmness options
  • Less heat retention than the average foam mattress
  • Lifetime warranty

Ideal For:

  • Sleepers who share the bed with a partner, pet, or kids
  • Those with chronic pain or sharp pressure points
  • All body types and sleeping positions

The MemoryLux by WinkBeds uses AirCell memory foam in its comfort system, which conforms closely to relieve pressure while dissipating heat. It’s an excellent king size memory foam mattress because it has all the benefits of memory foam while minimizing common drawbacks.

The Tencel cover wicks away heat and moisture to keep sleepers comfortable. Gel-infused polyfoam is quilted into the cover to cushion pressure points and help draw heat away. AirCell memory foam beneath the quilted cover returns to shape more quickly than traditional memory foam, making it easier for sleepers to change positions and move around on the mattress as needed. That said, the memory foam still absorbs motion and prevents sleep disturbances for couples and families sharing a king size bed.

Zoned transition polyfoam keeps sleepers from sinking in deeply, with firm support under the hips and lower back. The polyfoam is softer at the legs and shoulders to prevent pressure points from developing. High-density polyfoam makes up the bed’s durable support core.

Shoppers can choose between medium soft (4), medium (5), and firm (7) options for the MemoryLux. WinkBeds offers a 120-night sleep trial for the mattress, which includes a 30-night break-in period. The MemoryLux is protected by a lifetime warranty.

Read Our Full MemoryLux Mattress Review


Birch - Best Latex Hybrid

Price (King): $1,799

Height: 11"

Firmness: Medium Firm (6)

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Pressure Point Relief: 3/5

Sleeps Cool: 4/5

Motion Isolation: 3/5

Edge Support: 4/5

Durability: 4/5

Ease of Movement: 4/5

Sex: 4/5

Off-Gassing: 4/5

Birch Mattress

Highlights:

  • Made with organic and sustainable materials
  • Cotton cover wicks away moisture
  • Talalay latex relieves pressure points

Ideal For:

  • Environmentally conscious shoppers
  • Hot sleepers
  • All sleeping positions and body types

The Birch Natural Mattress is made with durable materials, making it an ideal choice for shoppers who want to invest in a king size mattress with a long lifespan. The natural, organic, and sustainable construction also appeals to eco-conscious shoppers who want to minimize their environmental footprints.

The organic cotton cover wicks away moisture and increases airflow throughout the comfort system. Instead of plastics or chemicals, the Birch uses a wool and rayon blend fire retardant layer. Natural, organic wool absorbs moisture and regulates temperature while retaining its shape over time.

The Talalay latex used in the comfort system contours to the shape of the body for pressure relief, benefiting side, back, stomach, and combination sleepers. Talalay latex is also breathable, so it can dissipate body heat and keep hot sleepers cool.

Pocketed coils form the support base of the mattress, helping to minimize motion transfer while reinforcing the latex and wool layers above. The coil base provides sturdy edge support for sleepers, so couples and families can make use of the entire mattress. A final wool base layer helps stabilize the coils.

Birch offers a 100-night sleep trial, which includes a 30-night break-in period. The Birch Natural Mattress is covered by a 25-year warranty.


Brooklyn Bedding Aurora - Best Cooling

Price (King): $2,124

Height: 13.5"

Firmness: Medium Soft (4), Medium Firm (6), Firm (7)

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Pressure Point Relief: 4/5

Sleeps Cool: 4/5, 3/5 (Medium Soft)

Motion Isolation: 4/5, 3/5 (Firm)

Edge Support: 4/5, 3/5 (Medium Soft)

Durability: 4/5

Ease of Movement: 4/5, 3/5 (Medium Soft)

Sex: 4/5, 3/5 (Medium Soft)

Off-Gassing: 3/5

Brooklyn Bedding Aurora Mattress

Highlights:

  • Three firmness options
  • Multiple foam layers for pressure relief
  • Includes phase change material for temperature regulation

Ideal For:

  • Hot sleepers
  • Couples
  • Shoppers looking for multiple firmness options to choose from

The Brooklyn Bedding Aurora keeps sleepers cool with several layers that regulate temperature and dissipate heat. The hybrid construction is responsive and supportive for most sleeping positions and body types.

The cover is woven with phase change material (PCM) to help regulate temperature. Copper-infused polyfoam helps draw heat away from the body while cushioning pressure points and promoting spinal alignment. A second layer of polyfoam responds to pressure and conforms to the shape of the body. The third layer is 1 inch of gel-infused memory foam for additional contouring and support.

The 8-inch support core is composed of a robust bed of pocketed coils that is resilient and responsive. A 1-inch layer of high-density polyfoam acts as a base to reinforce the coils.

For sleepers sharing a king size mattress, the Brooklyn Bedding Aurora offers standout motion isolation to minimize sleep disturbances. Sturdy edge support means sleepers can spread out across the mattress without feeling like they may roll off the bed.

Shoppers can choose between medium soft (4), medium firm (6), and firm (7). Brooklyn Bedding gives purchasers 120 nights to try out the Aurora. The mattress is covered by a 10-year warranty.

Read Our Full Brooklyn Bedding Aurora Mattress Review


What are the Main Differences Between a King and a California King?

A king and a California king mattress differ in length and width. A king mattress is 76 inches wide and 80 inches long, while a California king is 72 inches wide and 84 inches long. Shoppers should consider the following factors when comparing a king and a California king:

  • Width: A king mattress is 4 inches wider than a California king, giving couples a little more room to spread out on the bed. This is beneficial when it comes to sharing the bed with kids, or for couples who prefer to sleep farther apart instead of cozying up.
  • Length: The length of a king mattress is 80 inches, which is the same length as a queen mattress. This length should be comfortable for sleepers who are up to 6’4” tall. A California king is 4 inches longer, which is better for sleepers over 6’4” tall, or those who want extra foot room for pets.
  • Price: Brands often price king and California king models the same, though a California king may occasionally be more expensive. Shoppers should factor in the cost of sleep accessories when budgeting. King bed frames and bedding are often less expensive than California king options.
  • Availability of Accessories: A king size mattress is a popular choice, so there are plenty of options available when it comes to bed frames, sheets, and bedding. California king options are still prevalent, but may be slightly more limited in comparison.

Last Things to Think About When You’re Buying a King

Bed Frame
A king size mattress needs a king size bed frame. Choosing a compatible bed frame ensures that the mattress is properly supported. Shoppers should keep weight limits in mind when looking for a bed frame, in addition to the height of the bed frame and mattress combined.

Sheets and Bedding
King size sheets and bedding are widely available, with plenty of options for shoppers to choose from. Bedding in this size will be more expensive than smaller sizes, so shoppers should factor this in when budgeting for a new bed.

Doorways
The average doorway is 80 inches high and 36 inches wide, which shoppers should keep in mind for delivery and setup. This is less of a concern if the mattress is delivered as a bed-in-a-box, but is important to consider if you plan to move with the mattress. Since a king mattress is 76 inches wide, it should fit through most doorways standing on its side.

Room Size
A king bed is large and nearly square, so it lends itself to being in the center of the room. The bedroom should be large enough to accommodate nightstands and additional furniture, while still having enough space to walk around the bed.

Mattress Weight and Setup
King mattresses are heavy, with most options weighing over 100 pounds. Shoppers who need additional assistance setting up their mattress may want to consider White Glove delivery, which includes in-home delivery and setup by a team of couriers.