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Best Split King Mattress

Keith Cushner

Written by

Keith Cushner, Sleep Product Expert

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Methodology

We personally test every product featured in our reviews and guide to provide accurate, data-driven recommendations. Learn More

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Following a round of recent tests, we've updated this page to feature the Bear Elite Hybrid as our best split king mattress for couples. The Luxury Firm WinkBed remains our top overall pick for this product category.

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The split king is a simple solution to age-old problems that often arise when sharing a bed. This style gives each partner their own sleeping area by placing two separate mattresses next to each other, which can be invaluable for couples. Sleepers who change positions throughout the night don’t have to worry about motion transfer disturbing their partners. What’s more, couples with different firmness preferences each select a surface that meets their needs.

We’ll review our picks for the best split king mattresses on the market, examining their materials, performance, and value. Additionally, we’ll cover what to look for when shopping for a split king to help you make an informed decision between models.

The Best Split King Mattresses

Product Details

Best Overall

Luxury Firm WinkBed

Luxury Firm WinkBed
Mattress Type: Innerspring
Firmness: Medium Firm (6)
Trial length: 120 nights (30 night requirement)
Warranty: Lifetime, Limited
Sizes: Twin, Twin XL, Full, Queen, King, California King
Who it's best for:
  • People who weigh up to 230 pounds
  • Hot sleepers
  • Those who carry a disproportionate amount of weight in their stomach or hips
Highlights:
  • Euro-top hybrid design with a balanced medium firm feel
  • Zoned coils protect the edges and reinforce the sleeper’s midsection
  • Excellent airflow and a cooling, moisture-wicking cover
Luxury Firm WinkBed

Get $300 off all mattresses

The WinkBed is a luxury Euro-top hybrid sold in four different firmness levels. After testing the mattress, we believe the Luxury Firm WinkBed – the company’s medium firm (6) model – is best suited to adjustable owners who want to invest in a split king model. A balance of plushness and bounce further bolstered with a zoned support system makes the Luxury Firm an appealing option for sleepers across different weight and position groups. Although the Luxury Firm WinkBed is not sold in a traditional split king, customers can order two twin XL models to serve their needs.

The Luxury Firm WinkBed is constructed with gel-infused foam quilted into a Euro-top surface. The comfort system also includes a transitional layer of denser foam for light cushioning and extra reinforcement. The support core contains sturdy pocketed coils arranged in a zoned formation. Stronger coils are located beneath the midsection to prevent sinkage where many people carry most of their weight, and around the edges to minimize sinkage.

Back and stomach sleepers who weigh up to 230 pounds should receive adequate support and cushioning from the Luxury Firm WinkBed. The same is true of side sleepers weighing 130 to 230 pounds. The zoned coils limit the deep sinkage that people in these groups often encounter on softer hybrid models.

Another major strength of the Luxury Firm WinkBed is cooling. Air flows freely through the coil system to help the interior maintain a comfortable temperature, while the breathable Tencel cover also has moisture-wicking properties.

The WinkBed qualifies for free ground shipping throughout the contiguous U.S. Each order includes a 120-night sleep trial and lifetime warranty against manufacturing defects.

Best Value

Nectar Mattress

Nectar Mattress
Mattress Type: Foam
Firmness: Medium Firm (6)
Trial length: 365 nights
Warranty: Lifetime, Limited
Sizes: Twin, Twin XL, Full, Queen, King, California King, Split King
Who it's best for:
  • Side and back sleepers
  • People who are easily awakened by their sleep partner’s movements in bed
  • Shoppers with limited budgets
Highlights:
  • Medium firm all-foam design offers a balance of cushioning, contouring, and support
  • Excellent motion isolation for couples
  • All orders include a year-long sleep trial with free returns
Nectar Mattress

$599 off! $100 off + $499 in free accessories included.

The Nectar is proof that a high-quality, split king memory foam mattress doesn’t need to break the bank. Priced well below average for this mattress type, the Nectar features a thick memory foam comfort layer that cushions and adapts to your body. The medium firm (6) feel and dense support layers help ensure even weight distribution and limited sinkage beneath the midsection, making this mattress a good choice for people who normally find all-foam beds too soft.

Above-average cooling is another strength of the Nectar Mattress. The memory foam is infused with cooling gel intended to dissipate – rather than trap – body heat, while the breathable cover is made of a polyester, polyethylene, and nylon with cooling and moisture-wicking properties. All three foam layers absorb movement and significantly reduce motion transfer across the surface, so you and your partner won’t have your sleep disturbed when the other person changes positions or gets up in the middle of the night.

During our tests, the Nectar earned favorable ratings from side sleepers across all weight groups. These testers received ample cushioning around the shoulders and hips, two areas of frequent pressure buildup for sleepers who primarily use the side position. Back sleepers weighing up to 230 pounds were able to lie on the Nectar without sinking too much beneath the midsection. Stomach sleepers up to 230 pounds also felt comfortable on the mattress.

In addition to its affordable sticker price, the Nectar Mattress qualifies for free ground shipping anywhere in the contiguous U.S. Customers also receive a free sleep accessories bundle with their purchase, which includes a pillow, sheet set, and mattress protector. Nectar’s 365-night sleep trial is one of the longest in the online mattress industry. Owners who keep the mattress after the trial ends also receive a lifetime warranty against structural defects.

Best Luxury

Solaire

Solaire
Mattress Type: Airbed
Firmness: Adjustable - Soft (3) to Firm (8)
Trial length: 365 Nights ($99 Return Fee)
Warranty: Lifetime, Limited
Sizes: Twin XL, Full, Queen, King, California King, Split California King
Who it's best for:
  • Sleepers with changing firmness preferences
  • Hot sleepers
  • Those who value responsive pressure relief
Highlights:
  • 50 firmness settings
  • Latex and memory foam comfort system combines contouring and buoyancy
  • Separate air chambers with controls for each side of the bed
Solaire

Buy more, save more. Up to $450 off.

The Saatva Solaire is a highly versatile airbed with enough customizable options to satisfy a wide range of sleepers. The model has 50 firmness settings, allowing each partner to fine-tune their sleep surface. Dual controls come with queen and king sizes, including the split king option. Though this model’s price-point is higher than many traditional mattresses, the added cost may be worth it for couples with different firmness preferences and individuals who want a highly adaptable mattress.

While the Solaire is an airbed, it also has a comfort system atop the fillable air chambers to enhance its contouring and support. Its construction begins with a 3-inch Euro-top that gives the surface a plush feel.

Beneath that rests a layer of natural Talalay latex for responsive pressure relief. The latex is zoned with greater firmness under the lower back for even spinal support. A memory foam layer contours deeply, and a gel infusion is engineered to help draw heat away from the sleeper. A moisture barrier separates the comfort system from the core to prevent mechanical issues.

As an airbed, the Solaire’s support core consists of air chambers that inflate and deflate to create different firmness levels. Each sleeper can control their settings at the push of a button. Saatva has designed this model to perform quietly and discreetly. The core is reinforced at the perimeter to enhance the edge support.

Unsurprisingly, the Solaire’s versatility helps it excel in many testing categories, including pressure relief, temperature control, and durability. People with different position preferences and weights find this model comfortable since the firmness level ranges from soft (3) to firm (8).

Saatva backs the Solaire with a lifetime warranty and a 365-night sleep trial. Those wishing to return their mattress during their trial will receive a refund less a $99 transport fee. Shoppers in the contiguous U.S. enjoy free White Glove delivery.

Brooklyn Bedding Signature Hybrid

Best Firmness Options

Brooklyn Bedding Signature Hybrid

Brooklyn Bedding Signature Hybrid
Mattress Type: Hybrid
Firmness: Medium Soft (4), Medium Firm (6), Firm (8)
Trial length: 120 nights (30-night requirement)
Warranty: 10 Year, Limited
Sizes: Twin, Twin XL, Full, Queen, King, California King, Custom Sizes
Who it's best for:
  • Value seekers
  • People who experience pressure points
  • Hot sleepers
Highlights:
  • Available in three firmness levels
  • Individually wrapped coils move independently to reduce motion transfer
  • Priced competitively
Brooklyn Bedding Signature Hybrid

Save 20% on a Brooklyn Bedding mattress with this code: sleepfoundation20

Shoppers looking for an affordable split king may want to consider the Brooklyn Bedding Signature Hybrid. This hybrid model has multiple luxury features without the premium price tag. Shoppers can choose between three firmness levels that share similar materials but have distinct feels. You can opt for medium soft (4), medium firm (6), or firm (8), though Brooklyn Bedding includes a generous sleep trial in case your first choice isn’t ideal.

Exact specifications vary slightly between firmness options, but all three share the same basic comfort system materials. The surface has a quilted top designed to resist body impressions. Beneath that, a layer of patented TitanFlex polyfoam is engineered to adapt to your body’s movements throughout the night. VariFlex, another proprietary polyfoam, relieves pressure points by compressing deeply.

The support core contains 8 inches of pocketed coils that are individually wrapped to minimize how much motion transfers across the mattress’ surface. Higher-caliber coils at the perimeter give this model extra support around the edges. A thin polyfoam layer provides a stable base that helps reinforce the support core.

People who weigh more than 230 pounds are likely to prefer the robust support of the firm, the medium firm is well suited to those who weigh between 130 pounds and 230 pounds, and those under 130 pounds should enjoy the plush feel and pressure relief of the medium soft version. Each model relieves pressure and regulates temperatures well, especially considering the mattress’ price-point.

The Signature Hybrid carries a 10-year limited warranty and purchases within the contiguous U.S. include free shipping and a 120-night trial.

Helix Dusk

Best for Back Pain

Helix Dusk

Helix Dusk
Mattress Type: Hybrid
Firmness: Medium Firm (6)
Trial length: 100 nights (30-night requirement)
Warranty: 10 Year, Limited
Sizes: Twin, Twin XL, Full, Queen, King, California King
Who it's best for:
  • Hot sleepers
  • People who weigh 230 pounds or less
  • Value seekers
Highlights:
  • Balanced memory foam hybrid design cushions the body without too much sink
  • Perimeter coil reinforcement limits sinkage when you get in and out of bed
  • Affordable pricing and free shipping to all 50 states
Helix Dusk

Get up to $350 off + 2 free Dream Pillows

Helix Sleep offers a wide range of hybrid mattresses, each of which is specifically designed for certain types of people based on their body weight and sleep position. The Helix Dusk is geared toward back and stomach sleepers who weigh 130 to 230 pounds. That said, our hands-on testing shows the mattress provides adequate support for most people who weigh up to 230 pounds, regardless of their usual sleep position. This is particularly true for those who live with back pain, and need a mattress that cushions and reinforces the body in equal measure.

The Dusk’s construction includes a memory foam comfort layer, polyfoam transitional layer, and pocketed coil support core over a high-density foam base. The medium firm (6) feel of this mattress ensures noticeable, even contouring with limited sinkage beneath heavier areas of the body. Extra coil reinforcement around the perimeter reduces sinkage and makes the mattress feel stable when you sleep near the edges or get in and out of bed.

The coils are designed to move independently from one another, limiting the amount of motion transfer they generate, and the foam layers absorb movement well. As a result, the Dusk is a good option for couples and co-sleepers. Steady airflow through the coil system helps the mattress maintain a comfortable temperature. Another cooling component is the cover, which is composed of breathable knit polyester.

Please note that the Dusk is not available in a traditional split king size. Instead, you can purchase two twin XL models, which is essentially the same thing as a split king order.

If you aren’t certain whether the Dusk is the best Helix mattress for you, be sure to take the online mattress questionnaire on Helix Sleep’s website. You’ll receive specific mattress recommendations based on your weight, height, sleep position, and firmness preferences. The Dusk is one of the company’s more affordable models, and shipping is free to all 50 states. Each purchase is backed by a 100-night sleep trial and 10-year warranty.

Nolah Evolution 15

Best Pressure Relief

Nolah Evolution 15

Nolah Evolution 15
Mattress Type: Hybrid
Firmness: Medium (5), Medium Firm (6), Firm (8)
Trial length: 120 nights (30-night requirement)
Warranty: Lifetime, Limited
Sizes: Twin, Twin XL, Full, Queen, King, California King
Who it's best for:
  • Hot sleepers
  • People who struggle getting in and out of bed
  • Shoppers who don’t require a sleep trial
Highlights:
  • Available in three different firmness levels
  • Zoned coil system provides extra reinforcement for heavy areas of the body and limits sinkage along the edges
  • Engineered for cooling and temperature control
Nolah Evolution 15

Get an additional $30 off the Nolah Evolution Mattress for total savings of $730 with code: SF730OFF

The Nolah Evolution 15 is a luxury Euro-top hybrid available in three firmness levels to accommodate different weights and sleep positions. A sophisticated design with a balance of contouring and support makes the mattress a good option for adjustable owners seeking a split king.

In addition to the foam-padded Euro-top, the Evolution 15 is constructed with two layers of adaptive foam that distribute your weight and target pressure points along the spine. These foams are also designed to absorb a minimal amount of body heat and help you stay cool during the night, even if you tend to run warm in bed. A cover made of proprietary ArcticTex fabric provides additional cooling.

The support core contains pocketed coils to stabilize and reinforce the mattress without creating too much motion transfer or making the surface feel excessively stiff. This layer is divided into different zones based on coil gauge, with the thickest coils located beneath your midsection to prevent uncomfortable sinkage.

The Evolution 15 earns high marks for temperature neutrality thanks to its breathable foams and steady airflow throughout the coil system. The perimeter coils are also reinforced to minimize sinkage when you sleep near the edges or get in and out of bed. This push-back makes the mattress easy to move across for most people.

The medium (5) feel offers the closest contouring and cushioning, making it best suited to side and back sleepers who weigh up to 230 pounds. The firm (8) feel is most supportive, so back and stomach sleepers who weigh more than 230 pounds will probably prefer this option instead. The medium firm (6) feel is most balanced, and should be comfortable for anyone in the range of 130 to 230 pounds regardless of their primary sleep position.

Nolah offers free ground shipping throughout the contiguous U.S. The Evolution 15 comes with a 120-night sleep trial, though customers may forgo the trial period to lower the cost of their order – though this disqualifies them from returning the mattress at any point. All purchases also include a lifetime warranty against structural defects.

GhostBed Luxe

Best for Side Sleepers

GhostBed Luxe

GhostBed Luxe
Mattress Type: Foam
Firmness: Medium (5)
Trial length: 101 nights (30-night requirement)
Warranty: 25 Year, Limited
Sizes: Twin, Twin XL, Full, Queen, King, California King, Split King
Who it's best for:
  • Side and back sleepers
  • People who experience painful pressure buildup at night
  • Hot sleepers who tend to overheat on traditional foam beds
Highlights:
  • All-foam design provides excellent contouring
  • Strong pressure relief
  • Effective at motion isolation
GhostBed Luxe

30% off GhostBed mattresses & 2 free pillows + 10-year stain protection plan ($489 value)

The GhostBed Luxe is an all-foam mattress designed with soft, conforming comfort in mind. With a medium feel, which translates to a 5 on our 10-point firmness scale, the bed should appeal to side sleepers who need a mattress that cradles the shoulders and hips at night.

The comfort layer is composed of two memory foam layers that provide strong contouring for the sleeper’s body. People who experience pressure build-up in sensitive areas will benefit from the well-cushioned surface. Side and back sleepers fall into this category. Beneath is a transitional layer of proprietary Ghost Bounce foam, which offers a latex-like bounce that prevents the body from excessively sinking into the mattress. The support core contains high-density foam to give the mattress a strong, durable base.

Hot sleepers who tend to overheat on traditional memory foam beds may find the GhostBed Luxe an appealing alternative. The cover is made of a proprietary Ghose Ice fabric containing phase change material, which is meant to regulate temperature. The design also features a layer of Ghost Ice sandwiched between the memory foam layers, which helps reduce some of the heat retention that memory foam is known for.

GhostBed offers a 101-night sleep trial as well as a 25-year warranty for the Luxe. Customers receive free shipping within the contiguous U.S.

Tempur-Pedic TEMPUR-breeze

Best Cooling

Tempur-Pedic TEMPUR-breeze

Tempur-Pedic TEMPUR-breeze
Mattress Type: Foam, Hybrid
Firmness: Soft (3), Medium (5), Firm (7)
Trial length: 90 nights
Warranty: 10 Year, Limited
Sizes: Twin, Twin XL, Full, Queen, King, California King, Split King, Split California King
Who it's best for:
  • Hot sleepers
  • Shoppers looking for a choice between firmness levels
  • People with a significant budget
Highlights:
  • Phase change material designed to draw heat away from your body
  • Two designs intended for different cooling levels
  • Available in multiple firmness options
Tempur-Pedic TEMPUR-breeze

Use this SleepFoundation.org link for the most current discount on Tempur-Pedic mattresses

Tempur-Pedic has made itself a household name with its high-quality memory foam mattresses. The TEMPUR-breeze line is designed to combat one of memory foam’s main drawbacks: heat retention. This line includes two mattress models with distinct feels. The PRObreeze has a medium (5) feel and is available as a foam or a hybrid model. The all-foam LUXEbreeze comes in soft (3) and firm (8).

While all four of the TEMPUR-breeze options have different feels and specifications, they share similar materials. Each begins with a removable, washable cover that’s engineered for cooling. A layer of phase change material (PCM) is designed to help draw excess heat away from your body to help you stay cool.

All versions of the TEMPUR-breeze feature multiple layers of Tempur-Pedic’s patented memory foam. Each layer is formulated to provide a different level of support, though they all prioritize pressure relief. The LUXEbreeze models include a layer of ventilated memory foam to increase airflow, while the PRObreeze swaps it out for Tempur-Pedic’s original TEMPUR material. The all-foam options use polyfoam cores for support, and the hybrid model uses coils for added responsiveness and edge support.

As the name implies, the TEMPUR-breeze regulates temperatures well, especially considering the generous amount of memory foam. Shoppers should note that while both the PRObreeze and the LUXEbreeze have high price-points, the LUXEbreeze carries a significantly higher price tag because of its added cooling features and ventilated foam.

While most mattresses are delivered via mattress-in-a-box, this mattress comes with free White Glove delivery and a 90-night sleep trial. Your purchase is backed by a 10-year limited warranty.

Bear Elite Hybrid

Best for Couples

Bear Elite Hybrid

Bear Elite Hybrid
Mattress Type: Hybrid
Firmness: Medium (5), Medium Firm (6), Firm (8)
Trial length: 120 nights (30-night break-in period)
Warranty: Lifetime warranty
Sizes: Twin, Twin XL, Full, Queen, King, California King
Who it's best for:
  • Those who carry extra weight in their chest, stomach, and hips
  • Hot sleepers
  • People who have a hard time getting in and out of bed
Highlights:
  • Premium hybrid design combines cushioning foam layers and a robust coil system
  • Customers can choose between three firmness levels ranging from medium to firm
  • Cooling cover and steady airflow ensure excellent temperature control
Bear Elite Hybrid

30% off sitewide, plus 2 free Cloud Pillows with mattress purchase

Bear has earned a reputation for mattresses and other sleep products that deliver exceptional cooling. The Elite Hybrid – Bear’s newest mattress model – is no exception. A cover made from breathable Celliant-blend fabric, copper-infused memory foam, and steady air circulation through the coil layer allow you and your partner to sleep at a comfortable temperature throughout the year. Co-sleepers should also enjoy the Elite Hybrid for its strong edge support and good responsiveness for sex.

Another standout feature of the Elite Hybrid is its polyfoam transitional layer, which is divided into five firmness zones. This ensures most sleepers won’t experience deep sinkage around the torso and hips – areas where people tend to carry a disproportionate amount of weight – while the foam gently cradles the head, shoulders, and legs. In the support core, thicker coils along the perimeter minimize sinkage. This allows you and your partner to use the entire surface of the mattress for sleep or sex.

The mattress is available in three firmness levels. During our hands-on tests, the medium (5) design earned favorable ratings from side and back sleepers weighing up to 230 pounds. This model closely contours and cradles the spine, alleviating pressure in the process. Those who need slightly more support should opt for the medium firm (6) design. Our side sleepers between 130 and 230 pounds and back sleepers weighing up to 230 pounds found this model comfortable and supportive in equal measure. For people who weigh more than 230 pounds, the firm (8) design should provide adequate reinforcement.

Bear offers free standard delivery throughout the contiguous U.S. Each order comes with two free pillows, but customers can also pay a small upcharge and receive a sleep accessories bundle that includes two pillows, a sheet set, and a mattress protector. The Elite Hybrid comes with a 120-night sleep trial, and those who keep their mattress also receive a lifetime warranty against structural defects.

Why You Should Trust Us

Finding the best spilt king mattress can feel like a never-ending chore because of the sheer volume of available models. The team of sleep product experts at Sleep Foundation has tried and tested hundreds of mattresses to give our readers the most thorough list possible. Our testing team includes people with varying body types and position preferences to better reflect how different individuals may experience the same model.

Each mattress goes through a series of rigorous tests to rate it on multiple performance metrics, including pressure relief, temperature control, and more. We use a consistent methodology that incorporates qualitative feedback and quantitative measures, such as body-mapping technology and thermal imaging. We also try to gauge how a mattress will perform across all available sizes, which can be important when choosing a less popular option, like split king.

What is a Split King Mattress?

A split king mattress is exactly as it sounds: a king mattress that is split down the middle to form two separate mattresses. When put together, the dimensions are approximately 76 inches by 80 inches, which is the same as a traditional king. Apart, each mattress is a twin XL: 38 inches by 80 inches. We’ll examine the pros and cons of split king mattresses as well as discuss who might prefer this option.

Why Would You Need a Split King?

Split king mattresses are most often used by couples. Partners don’t always have the same sleeping needs. Body size, position, and personal preference affect what feels comfortable. A split king allows each partner to choose their own distinct sleep surface while still sharing a bed.

Differing Firmness Needs

Body weight and sleeping position are two of the biggest factors when choosing an appropriate firmness level. Couples’ needs can vary widely in this regard. For instance, a stomach sleeper over 230 pounds is likely to need a much firmer mattress than their partner who weighs under 130 pounds and sleeps on their side.

Motion Isolation

When a person tosses and turns or gets out of bed, vibrations may travel across the mattress surface and disturb their partner. Since a split king is two separate pieces, movement on one side of the bed does not transfer to the other.

For Use on an Adjustable Base

Sleepers may use an adjustable base for a wide variety of reasons, including comfort, mitigating snoring, and preventing acid reflux. Combining an adjustable base with a split king allows each partner to customize the position of their bed.

How to Choose a Split King Mattress

Picking the right split king mattress is much like choosing any other size but with a few additional considerations. If you’re purchasing a mattress to share with your partner, their preferences are also important to consider. You may want to reflect on your available floor space, decide what’s within your budget, and ensure that a split king will work with the bed frame you have in mind.

What to Look For in a Mattress

When mattress shopping, it’s critical to consider your sleep habits. Instead of getting caught by flashy features or marketing jargon, consider whether the basic functions line up with what you need.

Typically, your body weight and sleeping position have the biggest impacts on what you’ll prefer. First, narrow down your choices to models with the right level of support and comfort. Once you know if a mattress will meet your basic needs, then look at its additional features.

Price

Split king mattresses are one of the most expensive sizes, generally carrying higher price tags than traditional or California kings. To save some money, look for mattress deals around federal holidays.

Manufacturers differ in how they list prices. Some provide the cost of both sides together, and others sell them separately as twin XLs. Note how the price is listed before purchasing.

Sleeping Position

Sleeping position is one of the most important considerations when choosing a mattress. Typically, side sleepers enjoy softer mattresses, stomach sleepers prefer firmer, and back sleepers generally fall in the middle. Combination sleepers may want to consider mattresses that perform well across positions for their weight group.

Quality Materials

Not all mattress materials are equivalent, and price-point isn’t always an indicator of quality. Poorly manufactured components may break down more quickly, potentially limiting the mattress’ lifespan. High-quality materials often increase the cost of a mattress, but it may ultimately be more affordable to pay extra upfront rather than regularly replacing lower-quality models.

Firmness Level

Firmness affects comfort. The ideal level depends on your body type, sleep position, and personal preferences. To compare firmness, we rate it on a scale from 1 to 10. Lower numbers indicate a softer surface, while higher numbers are firmer. The majority of sleepers prefer a model between medium (5) and firm (7). Couples often select a different firmness for each side of their split king to more closely match their individual preferences.

Pressure Relief

Many sleepers develop pressure points from resting on the same parts of their bodies for long periods. A mattress that relieves pressure well redistributes weight and provides cushioning beneath pressure-prone body parts.

Motion Isolation

A mattress that isolates motion absorbs vibrations to prevent them from moving across the surface. Motion isolation can be invaluable for sleepers who share a bed. Split king mattresses isolate motion exceptionally well because they consist of two separate pieces.

Temperature Regulation

Body heat can build up while you sleep, and some people are more sensitive to excess warmth. Mattresses that regulate temperatures well often have good airflow, foam infused with cooling technology, or fabric designed to wick away heat and moisture. Innerspring and hybrid mattresses tend to sleep cooler than all-foam models because they trap less heat within their cores.

Edge Support

Edge support can be valuable for individuals who struggle to get into and out of bed and those who need the entire mattress surface. Since each side of a split king mattress is just 38 inches wide, a sturdy perimeter may be especially important. However, edge reinforcement could also affect the feel of the area where the two pieces meet.

Contouring

Some sleepers like the feel of a mattress that contours closely. This cradling can relieve pressure while supporting the spine. However, others find it restricts movement. Consider whether you prefer the feeling of sleeping “on” or “in” a mattress to determine what level of contouring you’d prefer.

Mattress Type

Hybrid, innerspring, foam, latex, and airbed models are all excellent options, though each has potential pros and cons. Airbeds are often ideal for those who want to adjust the firmness of the surface. Sleepers who prefer a traditional feel may opt for an innerspring model. Eco-conscious shoppers frequently like natural latex, and individuals who prioritize conforming often favor all-foam options. Hybrids can be an excellent choice for sleepers looking for a mixture of qualities.

Last Things to Consider with a Split King Mattress

Once you’ve got your eye on a split king mattress, it’s time to consider whether it’s a good fit for your home and lifestyle. We’ll highlight a few additional items to assess before hitting “add to cart.”

Split or Single King Foundation

Sleepers who opt for a split king can use a single-piece king foundation or a split foundation. Single-piece foundations can be heavy and tough to move from room to room. People prioritizing maneuverability may prefer a split foundation. Both sides can be moved independently from one another, but they can be placed side-by-side on a king size bed frame.

Luxury Features on Adjustable Beds

Shoppers often use split king mattresses on adjustable beds. Many adjustable beds come with features that may not be necessary but could be welcome additions. Massage features, temperature controls, and memory settings can all increase the cost. However, they may be worth it for sleepers who want an especially luxurious feel.

Mattress Warranty and Other Policies

Warranty, shipping, and trial policies vary widely between mattress manufacturers. Though many appear generous, there can be limitations or fees hidden in the fine print.

Check to see what a mattress warranty covers and for how long. Even if the mattress has lifetime coverage, examine what defects qualify, whether the policy is prorated, what exclusions apply, and what’s required of the owner.

Though many companies offer free shipping, there are often restrictions or additional charges for orders to P.O. boxes, Hawaii, Alaska, and Canada.

Some sleep trials may truly be risk-free, but others charge restocking, disposal, or transportation fees for returns. Companies also frequently allow just one trial per household, and many require that the unwanted mattress remains in excellent condition. Review all the fine print before committing to a mattress purchase.

Frequently Asked Questions About Split King Mattresses

  • What type of sheets fits a split king mattress?

    Split king mattresses require two twin XL fitted sheets and a single king size top sheet. Though the two twin XLs have the same dimensions as a king when pushed together, many sleepers find it cumbersome to stretch a king fitted sheet across both mattresses. Sleepers also generally opt for a king size comforter.

  • Is a split king the same as two twin XL mattresses?

    At its most basic level, a split king is two twin XL mattresses set next to each other. They can share the same single-piece foundation or sleepers can choose the versatility of a split king foundation or a split adjustable base.

    While many manufacturers sell split kings, shoppers can also purchase two twin XL mattresses separately to achieve the same effect. This can allow couples with different preferences to mix and match different firmnesses or models.

  • What type of mattress can you use with a split king adjustable bed?

    Most types of mattresses are compatible with split king adjustable beds, with the exception of some innersprings. Sleepers looking for maximum adjustability may want to opt for a foam mattress since it bends and conforms more easily. Some manufacturers also make adjustable frames designed to work seamlessly with their mattress models.

  • How much does a split king mattress cost?

    Split king prices can run the gamut depending on their materials, but they tend to be more expensive than traditional kings or California kings. Because they’re two separate mattresses, manufacturers use more materials to build them than they would to create a single king bed. Split king foundations are also generally more expensive for the same reason.

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About Our Editorial Team

author
Keith Cushner

Sleep Product Expert

Keith is a sleep product expert with nearly a decade of experience researching, developing, and testing sleep products.