The Best Split King Mattresses (2025)

The Nectar Premier Memory Foam is a higher-end all-foam mattress with everything you could want in a split king. It earned high scores for pressure relief (4.6), cooling (4.5), motion isolation (4.3), and edge support (4). All of these should appeal to couples, and the bed’s balanced medium feel should accommodate a variety of sleeper types. The split king model also retails for under $1,500, and you can even bundle it with Nectar’s Premier Adjustable Base to get the most bang for your buck.

The Nectar Premier came in at a 6/10 on our firmness scale, which is just a touch softer than your typical medium-firm. It has the traditional slow-moving feel of memory foam, providing plenty of sinkage and pressure relief for back and side sleepers.

Average-weight tester Melanie Kassel proclaimed this mattress was “made for side sleeping.” She said, “There’s a fair amount of sinkage but also enough of a supportive base to make this feel quite good.” Our heavyweight tester Matt Schickling agreed, but he also found comfort resting on his back. “I’ve been having some lower back pain lately, and I don’t feel any of that on this bed,” he said. “I’d recommend it for heavyweight sleepers—I also felt supported enough on my stomach.”

Most foam mattresses, especially those in the medium to soft range, tend to lack edge support, which can prove difficult for split king mattresses. However, the Nectar Premier pleasantly surprised us. Melanie, who performed the edge support tests, noticed a slight dip when she sat on the edge of the mattress. 

Lying down, though, felt much more secure. “In every position, I was cradled without extra sinkage around the very edge of the bed,” she said. “With my eyes closed, I could tell I was somewhat close to the edge, but never felt like I was going to fall off.”

Because of the Nectar’s cushy feel, we also expected it to perform well in our motion isolation tests, which is a boon for couples looking for a split king mattress. I actually hopped into bed alongside Melanie so she could get a feel for how much motion the bed absorbed. “Overall, Livvi’s movements were very muffled, and I had a hard time noticing exactly when she rolled around,” she explained. “Light sleepers should be all set on this model.”

If you or your partner are looking for a particularly bouncy mattress, though, the Premier isn’t for you. As Melanie tried to move on the mattress’s surface, she encountered significant resistance. “This mattress does hold onto you, and it isn’t springy or responsive. But I think this is a fair tradeoff for how nice and contouring it feels, so it wasn’t unexpected,” she finished.

Looking for more bounce in a mattress? Check out the Saatva Classic. Or you can read more about this bed in our dedicated Nectar Premier Memory Foam review.

When I think of luxury, I think of Saatva. Granted, I’m possibly biased, since the Saatva Classic is the mattress I sleep on every night. However, from the first night I slept on it, I would call my rest more than luxurious because of it. This bed features two coil layers and a plush pillow top for maximum support and comfort. It has some of the best edge support I’ve encountered in a mattress, earning a perfect score in our tests, which is ideal for making a split king feel like one bed. Otherwise, you might fall into the crack between the two mattresses that make up the set. You can also pair the Saatva Classic with the brand’s Adjustable Base Plus, also one of our favorites.

The Saatva Classic comes in multiple firmness options, including their mid-range Luxury Firm model, which we tested in the studio. I rated this mattress at a slightly firmer 7.5/10 on our firmness scale, though the pillow top still provides plenty of pressure relief. Physical therapist Dr. Hannah Habeeb thought that it “adds a lot of contouring,” especially at the hips and shoulders, for side sleepers. “I feel no pressure at my joints,” she explained.

Our testers echoed Dr. Habeeb’s sentiments. They found the Saatva Classic comfortable on their backs and sides, resulting in an overall pressure relief score of 4.5/5. Heavyweight tester Matt Schickling especially enjoyed the alignment he achieved on his back: “It feels like a stretch when you haven’t stretched in a while.” 

I also stomach-sleep on the Saatva Classic without incident, and I find that the slight pressure relief of the pillow top allows for just the right amount of give around the chest. This means that every sleeper type should find comfort on this mattress.

The Saatva’s firmer feel extends to the mattress’s perimeter, yielding rock-solid edge support. You’ll be able to sit and lie down at the far reaches of the mattress without feeling like you’re slipping or sliding off. In a split king mattress, I expect that the space between each of the twin XL mattresses should feel quite stable, perhaps to the point of seamlessness. 

Another thing I love about the Saatva is its responsiveness, a category in which the bed also earned a perfect rating. With two coil units, it’s unsurprising that this bed has so much bounce. As a combination sleeper, I can launch myself across the surface into any position I please without ever feeling stuck. This bounce should also be a plus for couples who are sexually active.

Where couples might encounter trouble is when it comes time to sleep—then the bounciness becomes a problem. If you’re a light sleeper, you’re going to feel essentially every movement on the Saatva Classic. The coils amplify motion more than the pillow top can stifle it, so if you or your partner are easily woken up, I wouldn’t recommend this mattress. Opt for a foam bed like the Nectar Premier instead.

For more about this bed, read our full Saatva Classic mattress review.

If you’re looking for a split king mattress to deal with pesky back pain, the Helix Midnight Luxe comes highly recommended by physical therapist Dr. Hannah Habeeb. This luxury hybrid offers plenty of pressure relief (earning a 4.2/5 score) and support in its medium-feel profile, the perfect combination for addressing pain and alignment. The bed also has top-notch edge support (the area where the mattress scored highest, at 4.8/5), making it a great pick for a split king mattress, plus admirable motion isolation (4/5) for couples.

Upon lying down on the Midnight Luxe, Dr. Habeeb immediately noticed the bed’s ability to align the spine properly. “The lumbar spine and pelvis feel neutral—it’s so supportive.” She further proclaimed that it was “just great for back pain” overall.

I tried out the Midnight Luxe myself, and I can more than see where Dr. Habeeb is coming from. This mattress has a medium feel —6/10 on our firmness scale—and quite a lot of contouring. When I lay on my back, I could feel the mattress filling in the gap at my lumbar area, keeping it comfortably propped up. 

This sentiment was echoed by my fellow testers as they rested on their side. Heavyweight tester Caine Wilkes said, “The plush top feels really nice and comfortable, while the bottom layers are more supportive. Overall, I’m comfortable, and I usually sleep on my side. So, I would recommend this for side sleepers in my weight category.”

The Midnight Luxe is great for support and pain relief, but it’s also great for a split king mattress. When I tested this mattress, I was most surprised by the bed’s edge support. Usually, with a fluffy pillow top like the Midnight Luxe, I’d expect to see a lot of sinkage. I still felt supported as I sat and lay down on the perimeter of the mattress, so I don’t think it’ll be a problem in the center of a split king. However, I will note that the head and foot of the bed don’t seem to offer the same reinforcement, so steer clear if you’re planning to use them to tie your shoes, for example.

Hot sleepers with back pain should also appreciate the Luxe’s cooling capability. When I lay down on the bed, I actually felt cool and crisp around my neck and arms, where my skin directly touched the cover. As the bed contours to you and the further you sink in, you’ll feel cooler; and it takes a while for things to get hot—even then, it’s only temperature-neutral. I doubt hot sleepers will complain of overheating on this mattress, especially paired with some cooling sheets.

While the Helix Midnight Luxe’s doughy pillow top helped the bed absorb some motion, which I find helpful for couples, I was a bit let down as a combination sleeper. Trying to move around in this bed, I felt a bit trapped by the dense surface, especially when it came to rolling from my back to my side. Sexually active couples may want to opt for a bed with a firmer, springier surface, like the Aurora Luxe Cooling.

Find out more in our full Helix Midnight Luxe mattress review.

Split king mattresses can be among the priciest, especially if you have to buy two twin XLs separately to achieve your desired combination. If you don’t want to break the bank but still want a quality mattress, look no further than the DreamCloud. This well-rounded hybrid mattress excelled in our response (5/5), edge support (4.4/5), and pressure relief (4.2/5) tests, earning at least a 4/5 in each performance category. 

A split king DreamCloud costs just under $1,200, making it the most affordable on our list. To sweeten the deal, you can also bundle it with the DreamCloud Adjustable Base, which our testers highly recommend.

The DreamCloud hybrid came in slightly firmer at 7.5/10 on our scale, leading to a more “on top” feel, per our testers. Despite this, Dr. Habeeb noted that the mattress still had a relatively orthopedic feel. “It contours to your body without letting you sink in too much,” she explained.

This explains how the DreamCloud earned a 4.2/5 in our pressure relief tests. Both our lightweight and heavyweight testers favored back and side sleeping. “A lot of hybrids that are too foamy up top lose the support factor and you sink too much, but this has a good balance of comfort and support,” said heavyweight tester Matt Schickling. Riley Otis, our lightweight tester, added, “The alignment in both positions is great—I think if you’re a lightweight combination sleeper, this would be a really good option for you.”

Regardless of which sleeping position you prefer, switching between them will go down without a hitch on the DreamCloud. Our in-house tester noted this mattress had “great bounce and responsiveness” as she moved around on the surface of the bed. “It’s very easy to switch positions,” she explained. “I never felt stuck in the mattress.”

Combination sleepers won’t have to worry about rolling off the bed either, thanks to the bed’s sturdy edges—a plus for split king shoppers too. “The edge barely collapses when you’re sitting down,” our in-house tester explained. “Even when I was lying down and trying to change positions, I felt very supported.” If you’re worried about the gap at the center of your split king, it likely won’t be an issue if you have two DreamCloud twin XLs.

Some especially hot sleepers may have a problem with the DreamCloud. Our tester noticed that the mattress heated up the longer she lay on it, but never to the point of feeling overheated. “I think it was more so matching my body heat than actively cooling,” she explained. 

If you want a bed that’ll have you feeling icy cool, consider the Helix Midnight Luxe. Or check out our full DreamCloud mattress review.

Sleepers over 230 pounds may often be let down by so-called supportive mattresses, but this isn’t the case with the WinkBed Plus. An upgraded version of the original WinkBed hybrid, this mattress features the same plush pillow top plus industrial-strength coils. It was a hit with our heavyweight tester, and as an average-weight sleeper myself, I found its firmer feel provided exceptional lift. Split king shoppers should appreciate the bed’s strong edge support (which earned 4.2/5), while couples will love the bed’s response for sex and motion isolation for undisturbed sleep.

I rated the WinkBed Plus at an 8/10 on our firmness scale, which is decidedly firm. But even as an average-weight sleeper, I didn’t find the mattress unyielding. You sink just enough into the pillow top to provide some pressure relief—something our heavyweight tester Matt Schickling greatly appreciated.

Matt thought the mattress felt “really good while side sleeping,” despite the aforementioned firmness. “My hips are quite aligned with my spine, and there’s no pressure to speak of in the shoulder or neck,” he explained. Switching to his back, he added, “Overall, I feel really well-supported, which is unique in a firm-feeling mattress. The bed curves very nicely to my lower back and definitely relieves pressure there.” Matt’s findings helped the WinkBed Plus earn an overall pressure relief rating of 4.3/5.

I’ve noticed that most hybrids designed for plus-size sleepers feature sturdy coils along the edges, and the WinkBed Plus is no exception. The only issues I had getting in and out of bed came from just how thick and lofty this mattress is. The topmost foams compress a bit when you sit down at the perimeter, but nothing that would cause concern. Lying down in each position also went over without incident, as regardless of which I took up, there was no danger of me sliding off—even when I had a leg over the edge.

Strong edge support means that couples should be able to spread out on this mattress and make the most of available space. The WinkBed Plus also offers plenty of motion isolation for these sleepers, too, thanks to the dense, doughy pillow top. I was surprised when my fellow tester hopped into bed alongside me; I expected the coils to amplify any motion. I could definitely feel some movement on the mattress, but it stayed consistent, even as my partner tried to move more aggressively. All in all, I think most light sleepers should be able to sleep through it.

The WinkBed Plus earned a 5/5 in our cooling test, which I had the pleasure of performing. I used a thermal gun to record the increase in surface temperature after I took a 7-minute nap on the mattress. The results came to a meager 3.7-degree increase, which is a sign of exceptional cooling and the reason for this score. However, I wouldn’t call the WinkBed Plus a true cooling mattress. There’s still some heat that gets trapped by the pillow top, but you won’t overheat.

If you’re a super-hot sleeper looking for something that’ll actively cool your body down, check out the Aurora Luxe Cooling. Otherwise, you can read more in our WinkBed Plus review.

Hybrid mattresses are prized for their balanced feel of softness and support, thanks to their use of cushy comfort layers and sturdy coils. Both are present in the Bear Elite Hybrid, a luxury mattress geared toward providing restful, rejuvenating sleep for athletes. But you don’t have to be super active to appreciate the bed’s comfort. 

This mattress has surprisingly sturdy edges (which earned a 4.6/5 in our edge support tests) a feature not typically seen in mattresses with a plush  pillow top, making it a solid option for split king shoppers. Sexually active couples or combination sleepers who share the bed should also appreciate the Elite Hybrid’s perfect response score, which makes moving around on the bed seamless.

The Bear Elite Hybrid comes in three firmness options for your choosing; for a split king, this means each side of the bed can be a different firmness. We tested the mid-range option, the Medium. Dr. Habeeb thought this mattress was softer than expected and recommended it for side sleepers. “It conforms to your body really nicely,” she explained. 

Our team, however, found it came in at a 6/10 on our firmness scale, which is a true medium feel. While Dr. Habeeb thought the mattress could be too soft for some back sleepers, it was actually the preferred position among our testers. Heavyweight sleeper Matt Schickling felt more pressure on his side than he did on his back. “I feel like my hips and shoulders are well-aligned,” he said. “If you’re a heavy back sleeper, I’d say this is a good pick.” Based on our testers’ findings, the Elite Hybrid earned an overall pressure relief score of 4/5.

Though the top of the mattress definitely felt soft, my colleague Cait Giddings thought the edges felt reinforced when she sat at the perimeter. Sitting down and getting in and out of bed went off without a hitch, so much so that Cait recommended it for older adults or those with mobility concerns. She added, “I felt like I could lie on the absolute farthest reaches of the bed without sliding or rolling out.”

Cait also awarded the Bear Elite Hybrid a perfect score in our response tests. “The soft pillow top gave me plenty of cushion, but I didn’t sink very far into it,” she explained. “It was a breeze to launch myself in and out of bed or roll around.” This spells good news for both combination sleepers and sexually active couples looking for seamless movement on the bed’s surface.

Though the Elite Hybrid primarily scored well, Cait encountered some mixed signals when it came time to the cooling test. She used a thermal gun to measure the increase in surface temperature after lying on the mattress for several minutes. Though she had no complaints, the machine recorded an increase of 12.6 degrees, more than twice what we see on average. “I didn’t feel the mattress heat up at all while I was lying there,” she said, “so I wouldn’t describe it as ‘sleeping hot’ despite the temperature gun results.”

If you’re a hot sleeper who doesn’t want to chance overheating, check out the Brooklyn Bedding Aurora Luxe Cooling. Otherwise, read more about this bed in our dedicated Bear Elite Hybrid review.

Hot sleepers wanting a split king mattress will find their match in the Brooklyn Bedding Aurora Luxe Cooling. This hybrid lives up to its name, providing cool sleep right at the bed’s surface; it scored an impressive 4.5/5 in our temperature regulation tests, but also stunned in responsiveness (5/5) and edge support (4.4/5). This firmer mattress should be a great pick for a robust split king mattress, especially for combination sleepers and couples seeking a great bed for sex.

The Aurora Luxe Cooling comes in multiple firmnesses, and we tested out the Medium model. Though it ended up feeling more like a 7.5/10 on our scale, which we’d call fairly firm. Dr. Habeeb praised this firmer feel for its support: “It maintains a nice, neutral spine and supports the lumbar spine and lower back—true for all the sleeping positions.”

Among our testers, opinions were mixed on which sleeping position felt best. Heavyweight tester Matt Schickling was surprised he enjoyed the bed on his side. “I feel pretty supported through the core, and more cradled than anything,” he explained. Average-weight tester Melanie Kassel, however, thought the bed was “much better” on her back: “It’s not overly plush, but there’s just enough cradling that it feels like there’s a hint of luxury.”

This firmer feel left our sleepers feeling more “on top” of the mattress rather than sinking in, which only helped out in the cooling tests, as less of your body heat seeps into the bed. Cait Giddings, who performed the thermal gun test, also noted that the cover of the bed felt “crisp” and cool to the point where it was almost “slippery.” After lying on the mattress for 7 minutes, the surface temperature increased by only 5.9 degrees. “The whole time, the mattress never felt like it was heating up,” she added.

Another pro of the Aurora Luxe’s firmness is that it extends all the way to the edges of the mattress. This means that sleepers should be able to spread out on their split king, but also comfortably cuddle in the center without slipping. “I was surprised by how solid and structured the edge of this bed felt,” Cait said. “I could sit and lie at the far edge of the bed without feeling like the edge dipped even an inch.”

The Aurora Luxe’s firmness isn’t for everyone, though. Some especially petite sleepers and folks with sensitive joints may need something a bit softer, so they can better sink into their mattress and achieve more pressure relief. If that sounds like you, you might want to opt for the Bear Elite Hybrid.

Find out more in our full Brooklyn Bedding Aurora Luxe Cooling review. 

If you’re looking for a split king mattress specifically for the adjustable base benefits, we’ve found that latex mattresses are often ideal, and the Birch Luxe Natural is our pick for the best of the best. Latex’s naturally buoyant and squishy feel means that it molds well to an adjustable base—and your body, as we discovered in our pressure relief tests. The Birch Luxe also has great edge support for a latex mattress (scoring 4.7/5), meaning there shouldn’t be any gapping or caving in the center of the bed if you and your partner want to snuggle up.

The Birch Luxe Natural ended up at a 7/10 on our firmness scale, which is just a touch firmer than standard medium-firm. Dr. Habeeb still noted that she felt the mattress was “soft enough” for side sleepers, the position she most recommended for the Luxe. “I feel my body relaxing on my side, but I also feel supported,” she explained.

Our average-weight tester agreed with Dr. Habeeb’s sentiments, echoing, “I feel really great support on my side, and the pressure relief is doing a good job.” However, unlike Dr. Habeeb, she also found comfort on her back. “My spine feels fully aligned and supported,” she said. She did add that she would prefer a bit more contouring from her mattress, but it was nothing that would deter her from sleeping on the Luxe for a couple of nights.

Edge support is an important factor for both adjustable bases and split king mattresses, as you’ll want all the space you can get and for your mattress to maintain its shape as you maneuver it. Thankfully, the Birch Luxe performed admirably in this category. Our in-house tester was able to exaggerate her position lying on the edge of the mattress without slipping off. “And when I sat down, I noticed a bounce that helped assist me out of the bed,” she added, which could be beneficial for seniors.

Latex’s buoyancy means that we expect to see plenty of responsiveness in these mattresses. The Birch Luxe delivered on this front, too, earning a perfect score. “I feel like this mattress has great bounce,” our tester said as she moved around on its surface. “I don’t feel like the mattress is fighting me, so it’s really easy to switch positions.”

This bounciness does spell trouble for some couples, especially if one of you is a light sleeper. While it’s great for sex, it can amplify motion when you’re trying to get some shut-eye after the main event; this means you might feel your partner shifting throughout the night. Our testers definitely noticed this when they tried out the mattress together, especially when someone got in and out of bed. Fellow light sleepers, I’d steer you toward a mattress that performed better in this category, like the Nectar Premier. 

You can read more about this bed in our full Birch Luxe Natural mattress review.