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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.
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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.
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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.
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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.
Best for Couples
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Many couples can experience sleep disturbances from their partner’s movement at night. The Helix Midnight’s thick foam comfort system combats this issue, absorbing most movement transfer and noise. Meanwhile, the coil system offers decent bounce that couples may enjoy for amorous activities.
The Midnight’s comfort system begins with an adaptive memory foam layer that reduces pressure buildup. Underneath is a polyfoam transitional layer that acts as a buffer between your body and the coils. The support core features pocketed coils that prevent uncomfortable sagging. Meanwhile, a perimeter reinforcement makes the mattress feel stable when you sleep near the edges or get in and out of bed.
The Helix Midnight is specifically geared toward side sleepers weighing up to 230 pounds, thanks to the adaptive foam layers and the supportive medium firm (6) feel. Our side-sleeping testers noted significant contouring for their sore shoulders and hips without sinking excessively. Back sleepers weighing up to 230 pounds also found the mattress supportive and comfortable, but stomach sleepers and those weighing more than 230 pounds may sink too deeply. Steady airflow through the coils earned the Midnight higher-than-average ratings in our temperature control tests compared to other mattresses with foam layers. This makes it a great choice if you’re a hot sleeper who likes the feel of memory foam.
Please note that the Midnight is not available in a traditional split king size. Instead, you can purchase two twin XL models, which is essentially the same as a split king order. The Midnight 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 a 10-year warranty.
Best Firmness Options
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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.
Best for Side Sleepers
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The Nolah Evolution 15 is a luxury Euro-top hybrid available in three firmness levels to accommodate different weights and sleep positions. Our side sleepers, in particular, enjoyed the Evolution 15’s foam comfort system that helped relieve pressure in their hips and shoulders.
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.
Best for Back Pain
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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. We also recommend the Elite Hybrid to sleepers with back pain, thanks to the balanced feel.
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.
Best for Adjustable Beds
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All-foam mattresses tend to have the most adjustability for an adjustable bed, and the Tempur-Pedic TEMPUR-Cloud is no exception. The memory foam mattress easily conforms to adjustable bed bases, so you can freely use all the features your adjustable bed offers.
The TEMPUR-Cloud’s comfort system begins with an adaptive memory foam layer with significant contouring to alleviate pressure. Underneath is a second layer of memory foam that ensures your weight is evenly distributed across the mattress surface. The support core features high-density polyfoam that prevents your body from sinking to an excessive degree. A stretch knit cover designed with moisture-wicking properties encases the mattress.
Our testing found the mattress’ all-foam construction and medium (5) feel best suits side sleepers weighing up to 230 pounds. Side sleepers on our team noted significant cushioning for their pressure points. Sleepers who frequently experience pain in their joints or lower back should also appreciate the TEMPUR-Cloud. Motion isolation was another one of the mattress’ strengths. The thick memory foam layers absorbed almost all motion transfer and noise when we moved across the mattress. This makes it a great choice if you share the bed with a restless sleep partner.
Tempur-Pedic ships free to customers living in the contiguous U.S. Mattress purchases come with a 90-night sleep trial, during which you can return the mattress for a full refund anytime after the 30-night break-in period. The TEMPUR-Cloud is backed by a 10-year warranty against structural defects.
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.
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.
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.
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.
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.
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.
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 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.
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 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.
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.
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.
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 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.
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.
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.
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.”
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.
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.
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.
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.
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.
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.
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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Our team at Sleep Foundation conducts extensive hands-on tests for each mattress to provide you with the most reliable, data-driven recommendations and reviews. Below are key guidelines that inform our testing methodology: