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Sleep is essential for human health, and not getting enough of it can increase the risk of several health conditions. Using a split king mattress offers improved motion control and the ability to customize the sleeping arrangement, which may allow for better sleep.

Insufficient sleep can lead to high blood pressure, heart disease, type 2 diabetes, stroke, obesity, and certain mental health conditions, according to the Centers for Disease Control and Prevention (CDC).

Also, many adults sleep with a partner. Research suggests that having a healthy co-sleeping pattern is associated with better overall health for the individuals and their relationship.

However, people in a couple may not be the same size, or they may have different physical needs, sleeping styles, sleeping schedules, or mattress preferences.

Finding the right mattress for a couple can be difficult. This is where a split king mattress can be helpful.

This article will discuss what a split king mattress is, the possible benefits and drawbacks of using one, and some options to try.

A split king mattress consists of two extra large twin beds on separate, but connected, foundations. The base is adjustable and sometimes comes with a remote control unit.

Because of this, people can raise the different sides of the bed to different heights. The bed takes up about the same amount of space as a king sized mattress.

A split king mattress also requires a split bedding arrangement, however, because the mattresses need two fitted twin bed sheets and one king sized top sheet.

Buying a mattress is a significant expense. Before deciding on a split king option, potential buyers should carefully balance the benefits and drawbacks it might involve.

The sections below will look at the potential benefits and drawbacks in more detail.


The benefits of using a split king mattress may include:

  • Great motion control: Since this bed consists of two distinct mattresses, one person’s movements will not make the other person bounce around.
  • Flexibility of mattress preferences: If one partner prefers a firm mattress and the other prefers a softer surface, they can both sleep with the firmness and comfort that they prefer.
  • A better night’s sleep: Freedom from the disturbance of a partner’s movements and being able to sleep on their preferred type of mattress can help both individuals sleep well.
  • Independent choices: Each person can select the kind of mattress they want and control the elevation independently — for example, one partner could read while the other sleeps. Some models also have options for individualized temperature control and more.
  • Easier to move: Moving what is essentially two twin mattresses may be easier and less awkward than moving one king sized mattress.


Some possible drawbacks associated with using a split king mattress include:

  • Some assembly required: Adjustable bed frames take time and thought to put together, so couples should be prepared for the effort it may take for assembly.
  • Mind the gap: Because a split king mattress actually comprises two separate mattresses, there will be a gap between the two sides of the bed.
  • More to buy: Purchasing a split king mattress typically means that the couple will have to buy new sheets.
  • Price: A split king mattress can be more expensive than a traditional king mattress, especially when one factors in the adjustable frame and new bedding required.

The sections below will look at five split king mattress options available to purchase.

Please note that the writer of this article has not tested any of these products. All information presented here is purely research-based.

Casper Adjustable Pro

This option comes with mattresses, an adjustable frame, and lots of extras, such as a massage option.

A remote control with custom presets helps people find the elevations that stop them from snoring, relieve pressure points, and more.

For the mattresses themselves, people can choose from Casper’s memory foam and hybrid offerings.

The Casper Adjustable Pro is available for purchase online here.

Amerisleep AS3

The manufacturers make their mattress out of Bio-Pur Foam, which they say helps cut down on the use of nonrenewable resources.

They designed this mattress to help prevent the buildup of heat by promoting airflow. They also say that it provides targeted relief to pressure points.

The Amerisleep AS3 is available for purchase online here.

Zoma Mattress

The manufacturers designed this mattress with athletes in mind. It offers three zone support for the hips and shoulders and promotes optimal alignment for the spine.

It is also made using breathable fabrics, cooling channels, and gel memory foam. The memory foam helps it mold to body contours and still bounce back.

The Zoma Mattress is available for purchase online here.

Stearns & Foster Estate Hurston

This mattress is available in firm, cushion firm, or plush, with firm and plush options in a pillow top, as well.

It measures 14 to 14.5 inches (35.6 to 36.8 centimeters) in thickness and features upholstery grade fabric and copper air vents.

The Stearns & Foster Estate Hurston is available for purchase online here.

Lucid Comfort Collection 10-inch Gel Memory Foam Mattress

This mattress blends memory foam and gel infusions to promote cool sleeping and relieve pressure points.

It is hypoallergenic and provides comfort and support while adapting to body contours, according to the manufacturers.

The Lucid Comfort Collection 10-inch Gel Memory Foam Mattress is available for purchase online here.

Couples seeking adaptability and flexibility in a mattress but who are not interested in a split king mattress might be interested in other types of mattress.

Other styles that may work well for couples include flippable mattresses, manually adjustable firmness mattresses, and electronically controlled adjustable firmness mattresses.

The sections below will look at a few of the available options.

Please note that the writer of this article has not tested any of these products. All information presented here is purely research-based.

Saatva Zenhaven Latex Mattress

Flippable mattresses offer two different kinds of firmness and support, one on each side.

This mattress lets purchasers choose between the Luxury Plush side and the Gentle Firm side, which is around 18% firmer.

The Saatva Zenhaven Latex Mattress is available for purchase online here.

ReST Smart Bed

Electronically controlled adjustable firmness mattresses such as this one typically use air to provide different levels of firmness within the same mattress.

This mattress lets users select comfort levels for multiple zones, and it can respond automatically to individual pressure points.

The ReST Smart Bed is available for purchase online here.

Reverie Dream Supreme II Hybrid Mattress

This is a manually adjustable firmness mattress.

It has foam coils that people can configure to meet their needs. Therefore, a couple could make one side of the bed firm and the other side softer, among many other configurations.

The manufacturers also designed this mattress to encourage breathability and help regulate sleepers’ body temperature.

The Reverie Dream Supreme II Hybrid Mattress is available for purchase online here.

A lot goes into buying a mattress, from decisions about a preferred degree of firmness to the identification of an individual’s sleeping style.

The process gets even more complicated for couples, who may have different physical needs in addition to different preferences. Purchasing a split king mattress can help address these issues.

A split king mattress is essentially two extra large twin mattresses placed next to each other on a single frame. This makes it possible for both partners to select the level of firmness that best suits their needs.

Split king mattresses dramatically improve motion control, as individuals actually sleep on different mattresses, which can be helpful for couples with very different needs.